The MORTAL INSTRUMENTS series by Cassandra Clare, follows Clary Fray as she discovers that she was born into the world of Nephillim, a world where demons, angels, vampires, and werewolves exist but are essentially invisible to normal “mundane” human eyes.  As Clary’s “sight” returns, she gets involved with a group of teen Shadowhunters (part human, part angel) who kill demons for a living.  When Clary’s mother is kidnapped by the most villainous and presumed-dead Shadowhunter