Imaginary Friend is a psychological horror novel by American author Stephen Chbosky.

It was published on October 1, 2019 by Grand Central Publishing and was an instant New York Times Best Seller.

A departure from his debut novel, Imaginary Friend was very well-received and debuted as a New York Times Best Seller.

[1] The review from Time[2] stated it evoked "echoes of Stephen King" and "well worth the time for those who dare," with additional positive reviews from The New York Times,[3] the Kirkus Review,[4] the Washington Post,[5] NPR[6] and numerous others, as well as being named one of Variety's Top 10 books of 2019.

[7] In 2023, the book was banned, in Clay County District Schools, Florida.