A new biography of Angelina Jolie and Brad Pitt claims the couple’s relationship is so unstable that it will not even last two years.

Celebrity author Ian Halperin is so confident in the assertions in his new book “Brangelina: The Untold Story of Brad Pitt and Angelina Jolie,” that he told PopEater that he would be willing to sleep naked in Times Square should anyone prove him wrong.

Halperin’s coverage runs the gamut from Angelina’s drug issues and depression to incest with her brother, which he claims was swept under the rug with a quickie marriage to Billy Bob Thornton.

Halperin also argues that Brad did cheat on Jen with Angelina, despite claims to the contrary.

“I spoke to people who worked on ‘Mr. & Mrs. Smith’ and they said there [were] fireworks between them from the first day of shooting. I think Angie had a plan to get Brad. She knew he was the most desirable man in Hollywood.”

Halperin’s confidence in the accuracy of his work rests in his access to over 900 sources for the book. He told PopEater, “there’s been so many stories about them, so many rumors and innuendo, and I really feel I was able to get the story behind the story and break it down properly.”

FULL STORY: Click here to read more from AOL’s PopEater.

(Photo: Reuters)