So, Nobody, or Bod, lives in the graveyard where majority of the book is set. He wanders in as a toddler after a man called Jack, from the society called ‘The Jacks of All Trades’, kills his entire family. His mother arrives in the graveyard as a ghost, just as she is fading away, and begs the ghosts of the graveyard to protect her child. Silas, the vampire, becomes his ‘physical’ not living guardian, as he is a vampire, a two ghosts who never had a child, take Bod in.
Bod is given the Freedom of the Graveyard. This means he has supernatural talents that only ghosts have, and he can travel where only supernatural beings can. These abilities lead him on adventures into the supernatural world, into Ghoul Graves, a mysterious tomb containing an entity known as the Sleer, the dreams and nightmares of a boy who bullies him, and the outside world of living, where he is forbidden to go.
It is mentioned throughout the book by characters that Bod is not allowed to go out into the world of the living, that it is dangerous out there. In Bod’s case, this is because Jack is trying to kill him. But this is true in any case. We are much safer, dead in a graveyard, than we are