This is a book for those who find it amusing that a biography of someone who has been dead 500 years is called 'unauthorised'. This is a book where the detail is in the devil – people pissing in the street; the locals baiting blind people armed with cudgels in a pit with a pig, often failing to whack the beast and hitting their colleagues by mistake; farting demons visiting the sleeper. This is a book for those who don't mind a spot of ribaldry, an affront to religious piety or suchlike in their graphic novels. Whether or not this is a book for those seeking a biography of Hieronymus Bosch remains to be seen.