At the time of publication of Three Trees the author was aged 62. Many years ago he was addicted to a Class A drug (amphetamine) and smoked cannabis. It was his involvement with drugs and mixing with other drug users is the reason he wrote Three Trees.
The story begins with woodland creatures going to Three Trees, three mighty oak trees that are situated in the centre of a cornfield. The Nobles (the wisest woodland creatures) inform everyone that Ron and Reg Crow twins and the Raven gang have returned to the area. Three seasons ago the Crow twins distributed bark tablets in the woodland.