So this trilogy is not manga but it a good little serires.  The lot revoulves around teenagers who kill demons and bad vampires, warlocks, wearewolves, and fair folk.  The teenagers and of course their parents are called Shadowhunters or Nephilim (Yes the supposed offspring of human and angles).   one such shadowhunter has gone bad and threatens to unlease a demon army on the shadowhunters and the teenagers the story centers around are entangled in the center of everything.    So i was wondering if anyone has read this trilogy and what you think about it.  i personally think its great, the best i've read in a while but i like fantacy scifoi stufff.  the author of twilight gave it a good review as well.  All three books are definately worth reading.