Unstable (A Cora Shields Suspense Thriller—Book 6‪)‬

In this action-packed mystery thriller by #1 bestselling author Blake Pierce, Cora Shields, 30, former Navy Seal turned FBI Special Agent, is fired from the FBI for breaking one rule too many. But when a former friend-turned-prostitute comes to Cora for help, swearing that neglected prostitutes are being abducted by serial killers, Cora cannot turn a blind eye—and finds herself in the race of her life to save a woman from a killer’s hands before it’s too late.


“A masterpiece of thriller and mystery.”

—Books and Movie Reviews, Roberto Mattos (re Once Gone)

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UNSTABLE (A Cora Shields Suspense Thriller—Book 6) is the sixth novel in a 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.


On the outside, Cora Shields is a total badass. A Navy SEAL veteran and a top agent in the FBI’s Behavioral Analysis Unit, Cora has a reputation for doing whatever it takes to catch a killer. What no one knows, though, is that she’s a wreck on the inside, addicted to painkillers and deeply depressed. 


Sometimes, cases need to be pursued outside the law.  


With no backup, Cora is finally free to act, to bend as many rules as she needs to, at any cost, to bring killers down.


She has found her new calling.


But will it also be her undoing?


A page-turning and harrowing crime thriller featuring a brilliant and tortured vigilante, the CORA SHIELDS series is a riveting mystery, packed with non-stop action, suspense, twists and turns, revelations, and driven by a breakneck pace that will keep you flipping pages late into the night.


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)

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“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)

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“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)

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“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)

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“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)

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“Exciting, heart pounding, edge of your seat book… a must read for mystery and suspense readers!”

—Reader review (Girl, Alone)

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