FBI BAU Special Agent Ruby Hunter remains haunted by "The 13 Killer," the serial killer who took everything from her—including her partner—before she put him away for good. Yet somehow, though behind bars, new bodies are showing up with his trademark 13 signature. Is he behind it? Will Ruby, still shattered, return to the force to confront him again?

"Molly Black has written a taut thriller that will keep you on the edge of your seat… I absolutely loved this book and can't wait to read the next book in the series!"
—Reader review for Girl One: Murder

This is the debut novel in a new series by #1 bestselling mystery and suspense author Molly Black, whose books have received over 2,000 five-star reviews and ratings.

FBI Special Agent Ruby Hunter wants nothing more than to put the 13 killer, and her days in the FBI, behind her, and to try to pick up the pieces of her life. But he refuses to rot quietly.

Ruby realizes she must do the thing she dreads the most: visit him in prison. But he is diabolical and cunning, an expert at toying with his victims—and with her.

Separating fact from fiction, his delusion from real-life clues, will be key for Ruby. With a new victim's life on the line, and time running out—and Ruby herself in danger—the stakes could not be higher.

But is Ruby walking right into his trap?

A complex psychological crime thriller full of twists and turns and packed with heart-pounding suspense, the mystery series will make you fall in love with a brilliant new female protagonist and keep you turning pages late into the night.

Bestselling author Molly Black is author of the MAYA GRAY FBI suspense thriller series, comprising ten books (and counting); the RYLIE WOLF FBI suspense thriller series, comprising six books; of the TAYLOR SAGE FBI suspense thriller series, comprising eight books; of the KATIE WINTER FBI suspense thriller series, comprising eleven books; of the RUBY HUNTER FBI suspense thriller series, comprising five books; of the CAITLIN DARE FBI suspense thriller series, comprising five books; of the REESE LINK mystery series, comprising six books; of the CLAIRE KING mystery series, comprising seven books (and counting); of the GRACE FORD mystery series, comprising seven books (and counting); of the CASEY BOLT suspense thriller series, comprising five books (and counting); and of the CLARA PIKE suspense thriller, comprising five books (and counting).

An avid reader and lifelong fan of the mystery and thriller genres, Molly loves to hear from you, so please feel free to visit www.mollyblackauthor.com to learn more and stay in touch.