The Midnight Library is a fantasy novel by Matt Haig, published on 13 August 2020 by Canongate Books.

[2] The novel follows a 35-year-old English woman unhappy in her dead-end life who is given the opportunity to experience lives she might have had if she had made different choices.

Her best friend, Izzy, is in Australia; she has just been fired; her relationship with her brother, Joe, is sour; her music teaching gig is seemingly cancelled; and her cat has just died.

She sees herself in a world where she is a glaciologist doing research in the Svalbard archipelago in the Arctic – a very different life from the one she tried to escape, but not necessarily a better choice.

Yet, its glories fade when she finds out he died years ago and that she has broken up with a famous movie star whom she idolized in her root life.

She returns to the Midnight Library, despite her resisting, which is collapsing due to her original body dying.

Realizing she isn't ready to die, she says a goodbye to Mrs. Elm and finds a book withstanding the destruction.

Nora notices Ash and plans to talk to him sometime, and she resumes her piano lessons with Leo.

[23] The book was also included in "Best of" lists from The Christian Science Monitor,[24] PureWow,[25] She Reads,[26] Lit Hub, St. Louis Public Radio, and The Washington Post.

[27] By September 2023, the book had sold a total of 733,221 copies in the United Kingdom with Haig's career sales surpassing 2.9 million.