Angelina Jolie Pens Introduction for Billy Bob Thornton's Book

02/23/2012 at 02:45 PM EST

Angelina Jolie and Billy Bob Thornton have reunited – in the pages of a book.

Jolie, who divorced Thornton in 2003, has written the foreword for her ex-husband's upcoming memoir, The Billy Bob Tapes: A Cave Full of Ghosts, due out May 15.

Jolie isn't the only famous person who contributed. An image of the cover of Thornton's book posted on Amazon reads, "Introduction by Angelina Jolie, with commentary by Robert Duvall, Dwight Yoakam and Tom Epperson."

RELATED: Angelina Jolie Gets a Standing Ovation

A description of the book posted on the site says The Billy Bob Tapes will include "colorful tales of his modest (to say the least) Southern upbringing, his bizarre phobias (komodo dragons?), his life, his loves (including his heartbreakingly brief marriage to fellow Oscar winner Angelina Jolie), and, of course, his movie career."

Thornton and Jolie remain friendly, he told reporters at the Berlin Film Festival earlier this year. He also said he was "thrilled" that Jolie decided to direct her first film, The Land of Blood and Honey, according to the Ottawa Citizen.

"I thought she did an amazing job," he said. "She really dug deep and it meant a lot to her. I'm very, very proud of her."

Jolie was also at the Berlin Film Festival where she was given a standing ovation after she screened her directorial debut.