Painted in a garden shed, Shaun Greenhalgh’s ‘Leonardos’ and ‘Lowrys’ fooled experts until, in 2007, he was jailed for forgery. Here, in his own words, is the story of a criminal driven not by profit but by a passion for art.

'A severed head can be many things: a loved one, a trophy, scientific data, criminal evidence, an educational prop, a religious relic, an artistic muse, a practical joke.' Larson surveys all these fates of human heads in a strange and often gruesome history that ranges from primitive tribes' shrunken heads to bizarre experiments in bringing guillotined heads back to life, and discusses issues such as the spectacle of public execution, the human face and the act of decapitation.