There are various contradictory versions of the story of the painter Marco di Salvieri. Marco di Salvieri was said to have had four wives - on this point the four Bookworms agree... But from this founding consensus, a veritable tree of discordant facts unfolded. For months now, at the very heart of the book you are about to read (and this is its soul), the life of the polygamous artist has been bitterly debated, divided between four divergent readings, four flavours of the same biographies - and four ways of filling in the gaps in history.