BEHIND CLOSED DOORS is an erotic adventure story in which the reader can choose what happens next. The book is divided into two halves(men read from one end,women the other)and each chapter gives a choice of sexual fantasies or 'doors'to open next.The story opens,in both cases,with a glimpse of a stranger at the entrance to a travelling circus;you choose the ending-do the central characters,having learned from theiradventures how to love,go off together or seperately?