 150,000 copies have been sold since 1976.The thirteenth edition was published in 2009, and the fourteenth in October, 2016.The "Squatters' Handbook" details guidelines on how to find property to squat in, what to do in confrontations with the police, how to maintain the property and set up temporary plumbing, and generally how to survive while squatting.It can be purchased for a small fee from the Advisory Service.