Chaz Bono, the son of singer Cher, is to write a memoir detailing his experiences of gender reassignment.

Bono, who lived as a lesbian named Chastity for 20 years, announced his plans to transition in June.

According to TMZ, he has signed a six-figure publishing deal and a tentative title for the book is 'Coming Clean'.

It is scheduled to hit shelves in 2011.

The 40-year-old is Cher's only child with late husband Sonny Bono. He is a gay rights activist but also works as a musician, writer and actor. He wrote about his experience of coming out to his mother in the memoir Family Outing.

In June, Cher publicly gave her support for Bono's transition. She said: "Chaz is embarking on a difficult journey… I respect the courage it takes to go through this transition in the glare of public scrutiny.

"Although I may not understand, I will strive to be understanding. The one thing that will never change is my abiding love for my child."