Question: is 13 reasons why based off a book

Answer: Yes, Thirteen Reasons Why has received recognition and awards from several young adult literary associations, and the paperback edition reached #1 on the New York Times Best Seller list in July 2011. A screenplay was written, based on the original release of the book, that became the basis of the dramatic television series 13 Reasons Why released through Netflix on March 31, 2017. The screenplay contains several deviations from the book, including, but not limited to, name changes, plot elements, and character personalities.