Lamar Odom is going to dish all the Kardashian's dirty secrets!

Lamar Odom has got some s*** to say and it may not be what the Kardashians want to hear!

According to the Daily Mail, the former basketball great - who is divorced from Khloe Kardashian - told InTouch Weekly the news last week. "I have a book coming out, an autobiography about my life. [The book will cover] everything. Everything. It's a free-for-all. [I'll be] open about everything that's been going on in my life, about the past."

Sources tell the publication he will reveal plenty of Kardashian family secrets about drugs, surgery as well as secret splits between Kim and Kanye West.

"Lamar is going to include never-before-told secrets about cheating, sex, and drugs, the booze, the pills, the cocaine, all of it," said a source.

"Lamar has nothing left to lose," added the friend.

It was added the former NBA star could earn $10 million for his tell-all.

"Lamar has been close to the Kardashian family through all of their craziest drama, and he is their biggest threat when it comes to spilling their dirtiest secrets," said a source.

It was not revealed whether he still has a Non Disclosure Agreement from working with E! (he appeared on Keeping Up With The Kardashians as well as the spinoff Khloe & Lamar) or his divorce from the 33-year-old beauty.

"This book will go down in history," it was added.

The insider claims that Odom will reveal that Kim and Kanye have had many secret splits: "Lamar knows all about their many separations, he can give details of their arguments, the name-calling and the accusations they've hurled at each other."

• This article was first published on nzherald.co.nz and is republished here with permission.