Thirteen Reasons Why is a 2007 young adult novel written by Jay Asher. The book was published by RazorBill, a young adult imprint of Penguin Books. The paperback edition hit #1 on the New York Times best-seller list in July 2011. The book is the basis of the television series 13 Reasons Why, released through Netflix on March 31, 2017.
Clay Jensen, a shy high school student, returns home from school one day to find that he has received a mysterious package in the mail. It contains seven double-sided cassette tapes used by Hannah Baker, a classmate who has recently committed suicide. Each tape details a reason that she killed herself. The tapes were sent to various other people before arriving at Clay's door.