The Enemy Within: The action-packed, unputdownable thriller from bestseller Rob Sinclair for 2025

The BRAND NEW, action-packed Ryker thriller from million-copy bestselling author Rob Sinclair. His past is coming back with a vengeance…

Ex-intelligence agent James Ryker has done many things in the past he’d prefer to forget. The last time he saw Gregor Minko - son to one of Ukraine’s most dangerous and politically influential arms dealers – Gregor was a scared 6-year-old boy in need of protection. But Ryker had to walk away. The boy wasn’t the mission.

Twenty years on Ryker is approached by two strangers in Antibes, France, asking for his help in finding Gregor – now going by the name of Gregor Rebrov. With a back catalogue of ‘crimes against the Russian state’, Gregor has escaped from a gulag in Siberia and is now in the wind.

Fuelled by old demons and painful memories of his own brutal actions in the past, Ryker finds himself once again in the thick of a complicated race against time and who knows how many of the world’s secret services, to find Gregor and get some answers.

As answers turn into more questions, they lead Ryker closer to home… and he can’t shake the feeling that he may be to blame.

A brand new high-stakes thriller. Perfect for fans of Lee Child and Robert Ludlum.

Praise for Rob Sinclair

'Gritty, brutal, explosive! Rob Sinclair’s writing never fails to deliver.' Alex Shaw

'An action-packed adventure' M J Porter

'A cracking thriller with a Reacheresque hero you can't help but root for!' John Ryder

'A hair-raising rollercoaster ride that doesn't let up for a single second' Bookish Jottings

'Packed full of action, political intrigue, betrayal and blood' David's Book Blurg

'Exciting, enjoyable and entertaining' Lynda's Book Reviews

'Had me gripped from the very first chapter' Me and My Books

'Keeps you on your seat's edge all the way through' Splashes Into Books

'A thriller full of suspense and intrigue' Travelling Book Junkie

'Totally gripping, thrilling, will keep you on the edge of your seat!' ramblingmads.com

'For me it was all about the motivations…the depth and emotion.. Simply wow!' ⭐⭐⭐⭐⭐ Reader Review

'A great page-turner of a read' ⭐⭐⭐⭐⭐ Reader Review

'Fast paced, brutal in places and yet highly entertaining and enjoyable. Twists and turns all over the place' ⭐⭐⭐⭐⭐ Reader Review

© 2025 Boldwood Books (Audiobook): 9781835618301
© 2025 Boldwood Books (Ebook): 9781835618356

Release date

Audiobook: 15 February 2025
Ebook: 15 February 2025