He isn’t particularly interested in the causes of madness, anyway, just its effect on the creation of music and on colleagues, friends, family and fans. So the book, which is larded with well-researched quotation, works well enough as an archival trawl through recording sessions and spats, and vignettes like Ray Davies turning up in a state of psychic collapse at the Whittington Hospital, dressed as a clown and in full stage make-up, after a 1973 gig in which he quit the Kinks.