Once Hidden (A Riley Paige Mystery—Book 25)

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! "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) ⭐⭐⭐⭐⭐