Mad with Much Heart is a 1945 crime thriller novel by English writer Gerald Butler.

[1] It was his fourth novel, and second most popular, after Kiss the Blood Off My Hands (1940).

The book is written in the noir style popular at the time.

[3] The American hardcover edition was published by Rinehart & Company on 22 August 1946.

Directed by Nicholas Ray it starred Ida Lupino, Robert Ryan and Ward Bond.