"Three Men in a Boat" is a humorous novel published in 1888 by English author Jerome K. Jerome. It follows the comedic adventures of three friends—J., George, and Harris—and a dog named Montmorency as they embark on a boating holiday on the Thames River. The novel garnered widespread acclaim for its wit and relatable depiction of everyday experiences, leading to a lasting cultural impact. The phrase and concept of the book have since been frequently referenced in literary and cultural contexts.