New York Times bestselling thriller author Rebecca Cantrell's novels include the award-winning Hannah Vogel mystery series, the critically acclaimed YA novel iDrakula, which was nominated for the APPY award and listed on Booklist's Top 10 Horror Fiction for Youth, and The World Beneath, the first book in an exciting new series and the winner of an International Thriller Writer award. She, her husband, and son currently live in Berlin.

James Rollins is the #1 New York Times bestselling author of international thrillers that have been translated into more than forty languages. His Sigma series has been lauded as one of the "top crowd pleasers" (New York Times) and one of the "hottest summer reads" (People magazine). In each novel, acclaimed for its originality, Rollins unveils unseen worlds, scientific breakthroughs, and historical secrets--and he does it all at breakneck speed and with stunning insight. He lives in the Sierra Nevada.