God offers Lucifer a second chance if he can live one month as a human. Lucifer accepts the offer so God takes Declan Gunn who is depressed London novelist contemplating suicide puts his soul on hold for a month and let’s Lucifer take power. This is a side-splittingly entertaining novel as Lucifer throws himself into the sex. The imagery of Lucifer's reactions to the different smells as he walks through London is dramatic. I will say that Duncan’s writing is very intense and I had really think on the events that happen in the story.