Outside The Lines (An Isla Rivers FBI Suspense Thriller—Book Three)

“A masterpiece of thriller and mystery.” —Books and Movie Reviews, Roberto Mattos (re Once Gone) ⭐⭐⭐⭐⭐

When Lake Superior's serene surface belies a deadly pattern, only FBI Agent Isla Rivers sees the ripples of murder among the so-called accidents. In a city where the line between nature's wrath and human cruelty is blurred, Isla must piece together a puzzle submerged in dark waters.

OUTSIDE THE LINES is the third book in a long-anticipated new series by #1 bestseller and USA Today bestselling author Blake Pierce, whose bestseller Once Gone (a free download) has received over 7,000 five star ratings and reviews. The series begins with OUTSIDE THE ROOM (book #1).

The Isla Rivers series is a riveting mystery series brimming with suspenseful cat-and-mouse dynamics and unexpected turns that will send shivers down your spine. Its enthralling female lead will capture your affections and keep you engrossed in the pages long after you turn out the lights. Fans of Lisa Regan, Lee Child, and Mary Burton are sure to fall in love.

Future books in the series are also available!

“An edge of your seat thriller in a new series that keeps you turning pages! ...So many twists, turns and red herrings… I can't wait to see what happens next.” —Reader review (Her Last Wish) ⭐⭐⭐⭐⭐

“A strong, complex story about two FBI agents trying to stop a serial killer. If you want an author to capture your attention and have you guessing, yet trying to put the pieces together, Pierce is your author!” —Reader review (Her Last Wish) ⭐⭐⭐⭐⭐

“A typical Blake Pierce twisting, turning, roller coaster ride suspense thriller. Will have you turning the pages to the last sentence of the last chapter!!!” —Reader review (City of Prey) ⭐⭐⭐⭐⭐

“Right from the start we have an unusual protagonist that I haven't seen done in this genre before. The action is nonstop… A very atmospheric novel that will keep you turning pages well into the wee hours.” —Reader review (City of Prey) ⭐⭐⭐⭐⭐

“Everything that I look for in a book… a great plot, interesting characters, and grabs your interest right away. The book moves along at a breakneck pace and stays that way until the end. Now on go I to book two!” —Reader review (Girl, Alone) ⭐⭐⭐⭐⭐

“Exciting, heart pounding, edge of your seat book… a must read for mystery and suspense readers!” —Reader review (Girl, Alone) ⭐⭐⭐⭐⭐

© 2025 Blake Pierce (Audiobook): 9798341598553

Release date

Audiobook: 16 December 2025