As reported by the BBC and Haaretz.
Mosab Hassan Yousef, son of Hamas leader Sheik Hassan Yousef, converted to Christianity and moved to California in 2007 and has co-written a book about his life - and, presumably, Hamas itself; which is due to be published in the USA. Hopefully, it won't be long until we can get copies here too because it promises to be fascinating and eye-opening reading.