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J.F. Penn

A supernatural relic. A thousand-year-old conspiracy. A madman who turns death into art. It's all in a day's work for the agents of ARKANE.

When a priceless relic disappears from Canterbury Cathedral, ARKANE – the agency tasked with protecting the world from supernatural adversaries – fears the worst… and sends its best.

Now, ARKANE agents Morgan Sierra and Jake Timber are on the job. Across Europe, through historical cities and into spectral forests forgotten by time, Morgan and Jake will follow the bloody trail of hidden relics wherever it leads, whatever the cost.

But even they aren’t ready for what’s coming.

Their hunt will lead them beyond danger, beyond darkness to the shadowed heart of a hidden citadel where lives an evil unlike any they’ve ever seen… and to a dark choice that will change them both forever.

NY Times and USA Today bestselling author J.F. Penn invites you to brave her most thrilling adventure yet. A world of the strange. A world of the supernatural. A world… of the ARKANE.

Click the link and grab your copy today!

Curl Up Press

Arkane

Tomb Of Relics

Two billion people are about to die… and they’re the lucky ones.

When a man in a hospital gown jumps to his death from the Western Wall in Israel, the authorities think it’s just another victim of Jerusalem Syndrome: a religious psychosis triggered by a visit to the holy city.

But when a second victim ritually disembowels himself, it’s the sign of much worse to come. Thanatos — a fanatical group dedicated to the destruction of the world — is on the move again.

The only ones who can stop them are ex-Israeli military psychologist, Oxford professor, and religious expert Morgan Sierra; and Jake Timber, agent of ARKANE, the British agency tasked with investigating — and sometimes saving the world from — the supernatural.

Last time, Morgan and Jake worked together to stop Thanatos from bringing about a dark version of Pentecost. This time, Thanatos is mixing science with sacrilege — combining the Devil’s Bible with mind-control technology to murder a quarter of the human race.

Together, Morgan and Jake will travel from the hallowed halls of Oxford, to the labs of a biotech company with a dark agenda, to a chapel made of human bones. They’ll go anywhere, do anything, to stop Thanatos.

But they have to hurry.

Thanatos is on the rise. Apocalypse is at the gates. And the only way to save a quarter of the world is for Morgan to uncover the secrets of her past… at the cost of her own future. Death awaits in a Crypt of Bone.

New York Times and USA Today bestselling author J.F. Penn draws you deeper into darkness with Crypt of Bone, the second of the ARKANE adventures. Tap the link, grab your copy, and discover what you’ve been missing in this standalone adventure!

Crypt of Bone: An ARKANE Thriller Book 2

It is the seat of judgment. The pinnacle of holiness. It is the Ark of the Covenant… and it’s the most dangerous weapon in existence.

A group of fanatics wearing masks of Egypt’s gods slaughter the curator of Cairo’s most famous museum. A cleaner in Washington, DC, discovers a decapitated head on top of a replica of the Ark of the Covenant. And someone is sharing videos of the deaths with extremists all over the world. 

It’s a job too big — and too strange — for the normal authorities, but it’s right up the alley of ARKANE, the British agency tasked with investigating mysteries on the edge of the supernatural. 

Normally ARKANE would send its best agents: Morgan Sierra, ex-Israeli military and professor of psychology and religion; and Jake Timber, a man as mysterious as he is dangerous. 

But Jake is in a coma, nearly killed on a previous mission — so Morgan will have to go it alone. Because the death toll is rising, and there’s no time to wait.

In over her head, in constant danger. Pursued by vicious mercenaries bent on revenge, hunted by assassins willing to do anything for their cause. But Morgan can’t stop, because the Ark of the Covenant is the prize, and it may be more than a simple religious artifact. 

It may be the secret to ancient alchemy, and the unlocking of a scientific breakthrough that could save the world… or end it.

A mix of Raiders of the Lost Ark, James Bond, and The Da Vinci Code, Ark of Blood is a mesmerizing adventure by New York Times and USA Today bestselling author J.F. Penn. Grab your copy today, and get lost in the world of ARKANE!

Ark of Blood: An ARKANE Thriller Book 3

Nationalistic fervor. Genocidal violence. 

The first time, the world went to war. This time, the world could end.

When a priest is murdered and one of the holiest relics of Christendom stolen, the ultra-nationalist Eröszak group is ready.

Fanning flames of hatred into a firestorm of anti-Semitic violence the likes of which haven’t been seen since the darkest days of World War II, Eröszak’s leader has the perfect plan to turn Hungary — and later, the world — into a nightmare of fascist rule.

They’ve planned for every option, for every eventuality… except one: Dr. Morgan Sierra, agent of ARKANE.

Morgan didn’t intend to get involved — she was just in Budapest to deliver a pair of artifacts to the historic Dohany Street synagogue. But when Eröszak’s thugs attack, Morgan finds herself the only thing standing between them and the overthrow of an entire government.

Nazi fanaticism, religious relics, and the blood of innocents combine to create a mystery fit for an agent of ARKANE — the British agency tasked with the uncovering of and defense against the supernatural.

And Morgan knows that she only has one chance to stop Eröszak and its leader. Because if she doesn’t, history may well repeat itself — only this time, the forces of darkness will win.

Based on true events, One Day in Budapest is the fourth standalone thriller in New York Times and USA Today bestselling author J.F. Penn’s ARKANE series. Grab your copy to find out what the buzz is about, and get ready for the dark, the disturbing… the ARKANE.

One Day In Budapest: ARKANE Thriller Book 4

She has been called many things: murderer, madwoman, monster. She will become only one thing: a god.

The Crone. A woman of legend, a creature of blood. A Valkyrie. She has tortured, murdered, maimed — performing all the rituals needed to call forth the power of Odin himself and summon Ragnarok. She just needs one more thing: the staff of Skara Brae, and her plans will be fulfilled.

But the staff is already in the hands of Morgan Sierra. An agent of ARKANE, the British agency tasked with protecting the world from supernatural crises, Morgan knows that giving up the staff could spell the end of all things.

Now the Crone has taken dozens of staff members, visitors — even children — hostage at the British Museum, demanding that Morgan turn over the staff. Willing to kill, possessor of powers beyond anything ARKANE has yet encountered, the Crone seems unstoppable. 

Morgan’s only advantages are her wit, her skill… and Blake Daniel (of the best-selling Brooke and Daniel crime thriller series). Cursed with clairvoyance, Blake’s powers may be just enough to help Morgan turn back the Crone and stop the end of the world.

But the Crone has her own secrets. Able to weave illusions, to wield fear, even to call forth the dead Vikings of old. She is the most powerful adversary Morgan has ever faced. But will she be the last?

The Crone beckons. Ragnarok looms. And it is up to Morgan and Blake to deny them both.

Day of the Vikings is the fifth thrilling story in the bestselling ARKANE series by New York Times and USA Today bestselling author J.F. Penn, with an epic crossover to the Brooke and Daniel stories. Tap the link, get your copy, and discover why so many readers love the ARKANE.

Day Of The Vikings: ARKANE Thriller Book 5

For millennia, they have held the gates of Hell shut against the darkness. But now they’re gone… and the gates are swinging wide.

When Morgan Sierra receives a package with a note from her father — murdered in a suicide bombing years ago — she goes on high alert. As an agent of ARKANE, the secret organization tasked with investigating the supernatural, Morgan has seen unusual things like this before. But even she isn’t prepared to face the danger that’s coming… from her own past.

Her father’s death was no accident. A member of the Remnant — a group of holy men schooled in the deepest mysteries of Kabbalah — her father was one of those charged with protecting our world from the demons that want to take it; to keep sealed the gates of Hell.

But the Remnant is dying, its members murdered by Adam Kadmon: a man once groomed to lead the Remnant before turning to twisted paths of power. Kadmon wants to open the portal between our world and Hell, to create a twisted, demonic version of our world over which he will reign supreme.

Now, Morgan and her partner — Jake Timber, the enigmatic agent who recruited her for ARKANE — are on the run. From the holiest cities in Israel to underwater cities lost to history, they must follow this trail to the end. To find a way to stop Kadmon before he offers the final sacrifice. A sacrifice of pain. A sacrifice of blood. A sacrifice of one of the children of the Remnant.

Kadmon intends to spill the blood of Morgan Sierra… and open wide the Gates of Hell.

Gates of Hell is the sixth installment in the bestselling ARKANE series by New York Times and USA Today bestselling author J.F. Penn. Read as part of the series, or as a standalone adventure — either way, grab your copy fast, and join Morgan and Jake on their journey through the ARKANE!

Gates of Hell: ARKANE Thriller Book 6

Any wish can be granted: money, power… even death itself can be beaten back. All it takes is the blood of an angel.

When a woman is tortured, hung from a cross, and burned alive in the center of New York City, Jake Timber is already on his way. 

Tasked with locating an extremist group interested in a recently discovered relic, the Cloisters Cross, Jake expected trouble. After all, as one of the top agents of ARKANE, the secret organization entrusted with protecting the world from supernatural threats, he’s been in the game a long time, and has saved the world more than once. 

But that’s the problem. Battered and broken again and again, the constant physical and mental struggles of his ARKANE missions have left Jake scarred.

Now, his investigation will lead Jake to the Blood of the Angel: a relic that can grant any wish to whoever drinks its contents. A race against time, and against the infinite resources of Gilles Noiret, a dying, ruthless billionaire willing to sacrifice anyone else to save his own life.

But this time, the race is different. Because this time Jake isn’t sure if he’s trying to stop Gilles and save the world… or if he’s looking for the Blood of the Angel so he can use it himself. What price would he pay to ease his own pain? Would he sacrifice one person? Two?

Or maybe even an entire city?

One Day in New York (readable as part of the bestselling ARKANE series or as a standalone title) is a supernatural adventure thriller from the mind of New York Times and USA Today bestselling author J.F. Penn. Click “Buy Now” and get your copy today!

One Day In New York: ARKANE Thriller Book 7

“I am become Death, destroyer of worlds.” — Bhagavad Gita

London. A street cleaner walks into the middle of Trafalgar Square and blows himself up. No mere act of terrorism. The explosion rips open a crater to reveal the underground headquarters of ARKANE — the ultra-secret British agency tasked with investigating the supernatural.

Within moments, armed commandos rappel into the breach, blow open ARKANE’s vault, and steal a single box containing an ancient relic linked to the Indian god Shiva.

By the time ARKANE’s best agents, Morgan Sierra and Jake Timber, arrive on the scene, it’s over. All they have is some video, a few thin leads, and the whispered words, “Don’t let the pieces come together.”

Soon, Morgan and Jake will find themselves on a quest unlike any they’ve experienced yet. Racing from the slums of Mumbai to the temples of Kolkata, from the unmarked graves in the killing fields in Rwanda to the most famous tomb of all — the Taj Majal. On the run from a mad scientist who wants to use ancient Indian relics to rewrite the genetic code of every human alive. In search of a threat woven into the very fabric of existence. 

They’ve faced danger before, but never like this. Because in a place beyond madness, all that remains is Death, the Destroyer of Worlds.

New York Times and USA Today bestselling author J.F. Penn brings you her biggest thrill-ride yet in her eighth ARKANE adventure… Get your copy of Destroyer of Worlds and see if you can solve the mystery first!

Destroyer Of Worlds: ARKANE Thriller Book 8

Today is the beginning, and tonight is the end…

A Babylonian tomb filled with the skeletons of snakes. Seven seals scattered around the world. A young woman, Lilith, who speaks in tongues before covering herself with living serpents. The Brotherhood of the Serpent sees it all, and knows the time of their greatest prophecy — set to occur under a pattern of stars that only align once every four thousand years — is at hand.

Soon the leader of the Brotherhood — Samael, known as Venom, the Angel of Death — will fulfill his destiny: to give Lilith the venom that will summon the Great Serpent to consume the world. 

The only thing standing in their way are Morgan Sierra and Jake Timber, the top agents of ARKANE.

A secret British agency tasked with protecting the world from supernatural powers, ARKANE has long operated in the shadows to keep the world safe. 

But not even Morgan and Jake can guess at the danger they’re about to face. A danger that will take them from the ruins of Iraq to the mist-wreathed Appalachian Mountains, from ancient archeological sites in Israel to the tombs of Egyptian pharaohs — Morgan and Jake have to move fast if they want to stop Samael and Lilith from fulfilling their destinies.

Darkness holds sway. The stars align. And Morgan and Jake will have to sacrifice all they hold dear to have a hope of stopping the End of Days.

In her ninth ARKANE book, New York Times and USA Today bestselling author J.F. Penn, taps into the darkest fears to bring you the thrilling adventure End of Days. Click “Buy Now” and get your copy, because the End of Days is at hand!

End of Days: ARKANE Thriller Book 9

The power to raise the dead… will mean the end of all life.

Jake Timber, agent of ARKANE — the secret organization charged with protecting the world from supernatural threat — is flying solo. 

His usual partner, Morgan Sierra, is on leave, still reeling from a recent brush with death. But evil takes no vacations, so when the corpse of a monk is discovered beneath a New Orleans cemetery — cruelly murdered, his body broken and his flesh carved with occult Voodoo markings — Jake knows it’s bad news.

But even he’s not ready for the truth: someone is looking for the Hand of Ezekiel.

Imbued with the power to raise the dead, the Hand was broken into five pieces, but now someone has found it… or something like it, because someone is killing people in New Orleans, then raising them from the dead as monsters.

In over his head, Jake needs Morgan’s help if he hopes to beat back this evil. But even if she comes back to help, will it be enough? The Hand of Ezekiel is being assembled. The dead are rising from the grave. 

And the power to stop it all can only be found in the land of the dead… in the Valley of Dry Bones.

New York Times and USA Today bestselling author J.F. Penn brings you the globe-trotting archaeological adventures of Indiana Jones, the power-hungry conspiracies of The Da Vinci Code, and the top agents of the world’s greatest supernatural agency. Tap the link to buy Valley of Dry Bones and discover a world you’ve been missing!