The Book of Lost Souls was an American comic book series published under the Icon Comics imprint, owned by Marvel Comics. It was written by J. Michael Straczynski with art by Colleen Doran. The comic follows Jonathan, a man who lived over a century ago who was transported to the 21st century during an attempted suicide. His new life involves supernatural mysteries and enigmatic characters such as a talking cat named Mystery and the Dark Man, whose plans for Jonathan are unclear. Jonathan is given the power to "save" the Lost, those individuals who have lost all hope in their lives.