The Unknown

by Riley Sager

  Best Seller  Look Inside Audio Sample 0:00 0:00 Read Sample ## By [Riley Sager](https://www.penguinrandomhouse.com/authors/2140230/riley-sager/)[ On Tour](https://www.penguinrandomhouse.com/authors/2140230/riley-sager/#events) ## By [Riley Sager](https://www.penguinrandomhouse.com/authors/2140230/riley-sager/)[ On Tour](https://www.penguinrandomhouse.com/authors/2140230/riley-sager/#events) ## By [Riley Sager](https://www.penguinrandomhouse.com/authors/2140230/riley-sager/)[ On Tour](https://www.penguinrandomhouse.com/authors/2140230/riley-sager/#events) ## By [Riley Sager](https://www.penguinrandomhouse.com/authors/2140230/riley-sager/)[ On Tour](https://www.penguinrandomhouse.com/authors/2140230/riley-sager/#events)Read by [Riley Sager](https://www.penguinrandomhouse.com/authors/2140230/riley-sager/)[ On Tour](https://www.penguinrandomhouse.com/authors/2140230/riley-sager/#events), [Maggie Grace](https://www.penguinrandomhouse.com/authors/2365837/maggie-grace/), [Patricia Santomasso](https://www.penguinrandomhouse.com/authors/2181555/patricia-santomasso/) and [Erin Lin](https://www.penguinrandomhouse.com/authors/2348999/erin-lin/)  Hardcover $32.00 Published on Aug 04, 2026 | 368 Pages Buy from Other Retailers: [Amazon](https://www.amazon.com/gp/product/B0FZSB66TM?tag=randohouseinc7986-20)[Barnes & Noble](https://barnesandnoble.sjv.io/c/128773/1894547/22009?subId1=PRHEFFDF5A7F1&u=https%3A%2F%2Fwww.barnesandnoble.com%2Fw%2F%3Fean%3D9798217044092)[Books A Million](https://www.tkqlhce.com/click-8373827-10747236?SID=PRHEFFDF5A7F1--9798217044092&url=https://www.booksamillion.com/p/9798217044092)[Bookshop.org](https://bookshop.org/a/2186/9798217044092?prhc=PRHEFFDF5A7F1)[Hudson Booksellers](https://www.hudsonbooksellers.com/book/9798217044092?utm_source=prh&utm_medium=affiliate&utm_term=301&utm_content=PRHEFFDF5A7F1--9798217044092&utm_campaign=9798217044092)[Powell's](https://www.powells.com/book/-9798217044092?utm_source=randomhouse&utm_campaign=randomhouse&utm_content=PRHEFFDF5A7F1--9798217044092)[Target](https://goto.target.com/c/128773/81938/2092?subId1=PRHEFFDF5A7F1--9798217044092&u=https%3A%2F%2Fwww.target.com%2Fs%3FsearchTerm%3D9798217044092)[Walmart](https://goto.walmart.com/c/128773/565706/9383?subId1=PRHEFFDF5A7F1&veh=aff&sourceid=imp_000011112222333344&u=https%3A%2F%2Fwww.walmart.com%2Fsearch%3Fquery%3D9798217044092)  Large Print $34.00 Published on Aug 04, 2026 | 496 Pages Buy from Other Retailers:  Ebook Published on Aug 04, 2026 | 368 Pages Buy from Other Retailers:  Audiobook Download Published on Aug 04, 2026 | 11 Hours 34 Minutes Buy from Other Retailers: See All Formats (3) + Paperback Hardcover * Hardcover $32.00 Published on Aug 04, 2026 | 368 Pages Buy from Other Retailers: [Amazon](https://www.amazon.com/gp/product/B0FZSB66TM?tag=randohouseinc7986-20)[Barnes & Noble](https://barnesandnoble.sjv.io/c/128773/1894547/22009?subId1=PRHEFFDF5A7F1&u=https%3A%2F%2Fwww.barnesandnoble.com%2Fw%2F%3Fean%3D9798217044092)[Books A Million](https://www.tkqlhce.com/click-8373827-10747236?SID=PRHEFFDF5A7F1--9798217044092&url=https://www.booksamillion.com/p/9798217044092)[Bookshop.org](https://bookshop.org/a/2186/9798217044092?prhc=PRHEFFDF5A7F1)[Hudson Booksellers](https://www.hudsonbooksellers.com/book/9798217044092?utm_sourc