Christopher Ciccone is readying a book on the world's most famous singer, who happens to be his sister, Madonna, his editor said on Thursday.

Simon Spotlight Entertainment (SSE), an imprint of Simon & Schuster, said 'Life with My Sister, Madonna' would hit bookstands 15 July.

Ciccone (47) in the past has worked alongside his sister, who is turning 50 on 16 August. He wrote the book with Wendy Leigh, and it has a first run of 350 000 copies.

"Ciccone's extraordinary memoir is based on his life and forty-seven years of growing up with and working with his sister — the most famous woman in the world.