I don't know about you but from the trailer itself, The Mortal Instruments: City of Bones kinda reminded me of several movie mixed and packaged into one.
The story begin with Clary Fray's mother went disappear without a trace and soon enough weird things started to happen around her. Stuff like gaining magical power, ability to see the unseen by human, and several more weird activities.
Left alone with no clue, Clary is forced to make her own decision especially when it comes to meeting an array of new creature that is always around her. It was then she join alliance with a line of warriors that stand to their principle and determined to protect our world from demons.
If that doesn't get interesting enough, will the existence of vampires and warewolfs among us make you excited? The very novel style plot is also very predictable from the middle part onward and you can keep your surprise element goodbye from there on.