Jon's dad was something of a pioneer in 1972, after writing a new kind of book - a book where readers could make their own choices and choose their own way through the story. Unfortunately, the idea was ahead of its time and his father died of a heart attack without ever finding the success he deserved. It's the summer and, between signing on to the unemployment allowance, Jon's moved back to his hometown to help his mum cope with her grief. Contending with his own grief, he loses himself in his father's unpublished manuscripts. Fiction and reality blend perhaps a little too closely, and when he discovers a hidden appendix he finds that his father's imagination was more terrifying and more powerful than he could have imagined.