There is a vogue at the moment for books which use art as a vehicle for examining the writer’s wider life and interests. Toby Ferris will certainly not have seen this as in any way an autobiography, but what it essentially does is use a quest for the 42 surviving paintings by Pieter Bruegel the Elder as a starting point for an exploration of anything and everything, from the death of a friend to art history, family history, philosophy, anthropology, mathematics, music and paragliding.