Madonna’s kid brother is publishing a book filled with the pop star’s secrets. Simon & Schuster will release Christopher Ciccone’s Madonna tell-all, Life With My Sister, on July 15th.

“Ciccone’s extraordinary memoir is based on his life and 47 years of growing up with and working with his sister—the most famous woman in the world,” the company said in a press release on Wednesday.

A rep for the Material Girl refused to comment on Chris’ new book.