FBI Agent Ella Dark has studied serial killers from the time she could read, devastated by the murder of her own father, and has gained an encyclopedic knowledge of murderers. But when a prolific serial killer begins terrorizing the area, Ella suspects there’s more going on than meets the eye.

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

GIRL, UNKNOWN (An Ella Dark FBI Suspense Thriller) is book #14 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 1,000 five star reviews.

FBI Agent Ella Dark, 29, is given her big chance to achieve her life’s dream: to join the Behavioral Crimes Unit. Ella’s hidden obsession of gaining an encyclopedic knowledge of serial killers has led to her being singled out for her brilliant mind, and invited to join the big leagues.

But nothing is adding up about this strange new killer. His kills are random and erratic, following no pattern Ella can find—and the body count is growing by the day.

Can Ella uncover the method to his madness before another victim dies?

A page-turning and harrowing crime thriller featuring a brilliant and tortured FBI agent, the ELLA DARK series is a riveting mystery, packed with suspense, twists and turns, revelations, and driven by a breakneck pace that will keep you flipping pages late into the night.

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)