Riley Sager, a pen name for Todd Ritter, is a renowned American author known for his thrilling novels. His breakout novel, FINAL GIRLS, won the ITW Thriller Award for Best Hardcover Novel and has been published in over thirty-five countries. Sager is also the author of other successful novels such as THE ONLY ONE LEFT and THE HOUSE ACROSS THE LAKE. His upcoming novel, MIDDLE OF THE NIGHT, is set to be published in June.

Sager hails from Pennsylvania and currently resides in Princeton, New Jersey. Besides writing, he enjoys reading, cooking, and watching movies. His favorite films include "Rear Window", "Jaws", and "Mary Poppins".