I'm Thinking of Ending Things (novel)

I'm Thinking of Ending Things is the 2016 debut novel of Canadian writer Iain Reid. It was first published in June 2016 in the United States by Simon & Schuster. The book has been described as a psychological thriller and horror fiction, and it is about a young woman who has many doubts about her relationship with her boyfriend. In spite of her reservations, she takes a road trip with him to meet his parents.

The novel was selected by National Public Radio as one of the best books of 2016, was a finalist in the 2016 Shirley Jackson Award, and appeared on the 2017 Ottawa Independent Writers Frank Hegyi Award for Emerging Authors longlist. In 2020, Netflix released a film adaptation of the book, written and directed by Charlie Kaufman and starring Jesse Plemons, Jessie Buckley, Toni Collette, and David Thewlis.