Riley Sager is the New York Times bestselling author of ten novels, most recently With a Vengeance, Middle of the Night and The Only One Left.

His novels have been published in 40 countries, with more than 4 million copies sold worldwide. His latest book, The Unknown, will be released on August 4.

A native of Pennsylvania, he now lives in Princeton, New Jersey.

Riley Sager is the New York Times bestselling author of ten novels, most recently With a Vengeance, Middle of the Night and The Only One Left.

His novels have been published in 40 countries, with more than 4 million copies sold worldwide. His latest book, The Unknown, will be released on August 4.

A native of Pennsylvania, he now lives in Princeton, New Jersey.