Riley is an apprentice demon trapper. She's good at it too, just like her dad, and wants to follow in his footsteps, despite the misgivings of the demon trapper council. When her dad is killed by a demon, it makes sense that she should carry on, with the small matter of needing to keep vigil over his body to prevent it being stolen and used for menial labour. And then there's the matter of her apprenticeship, and a dark plot to keep the trappers from doing their work..
This is gripping, fast-moving, adventuring of the highest order, Riley is a great kick-ass teen and full of the usual teen angst and worries, although despite a few problems at the makeshift schools she has to attend, most of her worries are demonic in origin. Riley has to grow up fast and meet some adult situations (death, destruction, paying the rent) as best she can, but has good friends and a strong self-confidence instilled by her father.
Demons make a nice change from vampires, and there's plenty of action here, quite a few dramatic moments and heart-in-your-mouth set pieces, making this a great read for teens and adults alike. I loved this and am eagerly waiting for the sequel, as there's more fun here than just one book could contain.