On 'The Ellen DeGeneres Show,' 'Late Late Show' host Craig Ferguson discussed his memoir, 'American on Purpose: The Improbable Adventures of An Unlikely Patriot,' which includes frank accounts of alcohol and drug use, as well as an attempt by the late-night host to commit suicide.

According to Ferguson, he intended to end his life by jumping of a landmark bridge in London, but got sidetracked when someone offered him a glass of sherry.

Watch the video after the jump.

How hot is Craig Ferguson? By my thermometer, he's sizzling. His Late Late Show has risen up to challenge Conan O'Brien in the Nielsens, he was the emcee at the White House Press Correspondents dinner -- riffing on W. right to his face! -- and now the publishing world wants his story. HarperCollins has signed Craig Ferguson to write American on Purpose, the story of his life from small town Scottish boy to big time talk show comic. The book is due to be published in the fall of 2009.

As the title suggests, a big part of the story is Craig's choice to become an American citizen, which he did earlier this year. Craig said he hopes the book "...will inspire other alcoholic punk rock drummers from Scotland to find their true place in U.S. late night television." Well, I say to that, hooray! The talk show host also cracked, "I wanted to get the story down before I get so old I forget it and start believing the crap on Wikipedia."