The Graveyard Book by Neil Gaiman
There are dangers and adventures for Bod in the graveyard: the strange and terrible menace of the Sleer; a gravestone entrance to a desert that leads to the city of ghouls; friendship with a witch, and so much more.
But it is in the land of the living that real danger lurks, for it is there that the man Jack lives and he has already killed Bod's family.