The Book of Dave can be considered to be a parody of modern religion especially with regard to blind faith. For example, the Hamsters, the inhabitants of the island of Ham (actually the higher, unflooded part of Hampstead Heath), believe that certain verses out of the book are sacred hymns, where in fact they are just excerpts from The Knowledge. Additionally, aspects of Dave's life are ritualised into legal requirements: such as changeover, the act of custodial exchange of children, and parents being forced to live apart even though they would be happy living together. This challenges the assumption of whether people should follow something just because it is written in an old book. — Will Self