Her Last Vow (Rachel Gift #25)

Her Last Vow (Rachel Gift #25) by Blake Pierce is out now, published September 2, 2026.

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Her Last Vow (Rachel Gift #25)

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Her Last Vow (Rachel Gift #25) Release Date: September 2, 2026

Published

When users of a popular fitness tracking app begin dying exactly when the algorithm predicts they’ll reach their “optimal health peak,” FBI Agent Rachel Gift must determine if technology has turned deadly. Racing against predictive data that seems to forecast death itself, can she decode whether the app is killing its users—or if someone is using the information to hunt them down?

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

HER LAST VOW (A Rachel Gift FBI Suspense Thriller) is book #25 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.

FBI Agent Rachel Gift, 33, unparalleled for her ability to enter the minds of serial killers, is a rising star in the Behavioral Crimes Unit—until a routine doctor visit reveals she has but a few months left to live.

Not wishing to burden others with her pain, Rachel decides, agonizing as it is, not to tell anyone—not even her boss, her partner, her husband, or her seven-year-old daughter. She wants to go down fighting, and to take as many serial killers with her as she can, but she can feel herself slipping.

While investigating the murders, a hospice worker recognizes the tired look in Rachel’s eye. She can’t hide her condition anymore and she knows it.

It is time to confess her truth—but not before she catches her last killer.

A page-turning and harrowing crime thriller featuring a brilliant and tortured FBI agent, the RACHEL GIFT 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. Fans of Rachel Caine, Teresa Driscoll and Robert Dugoni are sure to fall in love.

Future books in this series are now available!

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Genre: Thriller

Blake Pierce

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