The Unknown

The next twisty, tension-filled, dizzying thriller from the master of suspense. You'll never guess what's coming next.

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. The Unkown is his latest book.

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