CNN host Piers Morgan is writing a book about his career, his job as news show anchor and his interviews with Hollywood stars and world leaders.

Shooting Straight: Guns, Gays, God and George Clooney, to be published in October, will be written in a diary format and delve into the controversy surrounding his gun control campaign and love affair with America.

"Piers Morgan is honest, forthcoming and fearless. I fully expect Shooting Straight to enlighten some readers and enrage others," said Jennifer Bergstrom, vice president and publisher of Gallery Books.

"Either way, it will be a thought-provoking book that I'm thrilled to publish."

Morgan, 48, replaced veteran host Larry King on CNN to host the interview show Piers Morgan Live in 2011.

After criticising pro-gun guests on his show following the Newtown, Connecticut, killings in December that left 26 dead, including 20 children, more than 48000 people signed a petition demanding the Englishman be deported.

The petition accused Morgan of subverting the Second Amendment of the US Constitution, which guarantees the right to bear arms.

The controversial host started his career in England where, at age 28, he was the youngest editor of a national newspaper, the now defunct News of the World tabloid.

He was fired as editor of the Daily Mirror in 2004 after it published false photos of Iraqi prisoners apparently being abused by British soldiers.

Morgan gained fame in the US after becoming a judge on Simon Cowell's TV show America's Got Talent and as the winner of The Celebrity Apprentice.