English musician Pete Doherty is all set to write an explosive tell-all book about his affair with supermodel Kate Moss. Doherty’s book, billed as an “intensely personal biography”, is expected to reveal all the secrets of one of the most talked about showbiz relationships of recent years. The book has the 29-year-old singer in talks with major publishers for a six-figure deal and has hired ex-drug addict Sean Boru to help him write the book. Boru, who has also written biographies with snooker