He barely saw his children, whose drawings are on his study walls ("Happy Hanukkah, Daddy!"), and his wife, the novelist Santa Sebag Montefiore (the elder, saner sister of Tara Palmer-Tomkinson), had to put up with him "sometimes never coming to bed, just writing all night". The result is a vast, gripping history, tumultuous and very bloody - but that's fine with Sebag, as he is known. "Readers love death."