City of Bones

When 15-year old Clary Fray heads out to the Pandemonium Club with her friend Simon, her world is turned upside down. She witnesses a murder committed by three teenagers on a boy that wasn't even an actual boy. The weirdest part yet is that she seems to be the only one witnessing it, even though the club is full of people. Traumatized by what she had just seen, Clary decides to forget it even happened, but it is hard to forget when one of the teenagers, Jace Wayland, continues to make pop-up appearances. When Clary finally confronts Jace, her mother gets attacked and abducted, and she is forced to fight    a demon. This causes a ripple of events that lead her to finding out if the life she had been living for 15 years was really her life at all.