The City of Bones is about a sixteen year old girl in Brooklyn, Clary Fray, who finds out about the secret civilisation of shadowhunters, downworlders (vampires, werewolves, warlocks and faeries) and demons. Shadowhunters are half angel, half human hybrids of immense power strong enough to restore, balance and protect the world in the war against evil.
Wow! Did you see that shadowhunter kill that demon?
The shadowhunters show Clary the ways of the Nephilim (shadowhunter) while she is on a venture to find her mother who was taken by her father that she never knew-Valentine Morgenstern. She has to overcome fear by entering the shadow world and learning the way of the shadowhuters. On her venture to save her mother she falls in love with hottie Jace Wayland. Who save her many time then finds out the horriable truth. What will clary do?
So check it out the mortal instruments, city of bones by Cassandra Clare.