City of Fallen Angels is the fourth book in the bestselling series The Mortal Instruments.
“City of Fallen Angels takes place two months after the events of City of Glass. In it, a mysterious someone’s killing the Shadowhunters who used to be in Valentine’s Circle and displaying their bodies around New York City in a manner designed to provoke hostility between Downworlders and Shadowhunters, leaving tensions running high in the city and disrupting Clary’s plan to lead as normal a life as she can — training to be a Shadowhunter, and pursuing her relationship with Jace. As Jace and Clary delve into the issue of the murdered Shadowhunters, they discover a mystery that has deeply personal consequences for them — consequences that may strengthen their relationship, or rip it apart forever. Meanwhile, internecine warfare among vampires is tearing the Downworld community apart, and only Simon — the Daylighter who everyone wants on their side — can decide the outcome; too bad he wants nothing to do with Downworld politics. Love, blood, betrayal and revenge: the stakes are higher than ever in City of Fallen Angels.” (From Goodreads)
Something Deadly This Way Comes- Kim Harrison
Seventeen, dead, and in charge of Heaven's dark angels—all itching to kill someone.
Madison Avery's dreams of ever fitting in at her new school died when she did. Especially since she was able to maintain the illusion of a body, deal with a pesky guardian angel, and oh yeah, bring the reaper who killed her to his untimely end. Not exactly in-crowd material. It's amazing that her crush, Josh, doesn't think she's totally nuts.
Now Madison has learned that she's the dark timekeeper, in charge of angels who follow the murky guidelines of fate. Never one to abide by the rules, she decides it's time for a major change to the system. With the help of some unlikely allies, Madison forms a rogue group of reapers who definitely don't adhere to the rules of the heavens.
But as she grapples with the terrifying new skills that come with being a timekeeper, Madison realizes she may not be prepared for what lies ahead—unless she gets some seriously divine intervention. (From Goodreads)