Last October — a full year before the book would reach the shelves — he came to my Farringdon studio to sit for the cover of Things I Took from the Dark: The Museum of Me, his illustrated memoir, published by Quercus on 8 October. For thirty years — from The League of Gentlemen through Psychoville to Inside No. 9, which brought him and Steve Pemberton a BAFTA for its final series — Shearsmith has been British television's most reliable custodian of the uncanny. The book explains why.