It Ends with Us is a romance novel by Colleen Hoover, published by Atria Books on August 2, 2016.[1] It is based on the relationship between Hoover's mother and father.[2] Hoover described it in 2016 as "the hardest book I've ever written."[3] As of 2019, the novel had sold over a million copies worldwide and been translated into over twenty languages.[4]