Check out the latest The Dark Artifices snippet that Cassandra Clare posted yesterday on her Tumblr:
“Do I?” Diana leaned back in her chair, tapping her pencil against the back of her right hand, where the Rune of Sight was inked. Every Shadowhunter had a Voyance rune on their dominant hand, allowing them to see through glamours. Emma’s was on her left. “Well, if I know what you did, and you know what you did, maybe you should tell me what your punishment should be?”
“I should have to take care of a box of kittens,” Emma said immediately. “Definitely a box of kittens. You know how cruel kittens are, with their tiny little claws and terrible attitudes.”

Lady Midnight, the first book of The Dark Artifices trilogy, will be released sometime in 2015 (Goodreads has it scheduled for sometime in September 2015), but you can get a copy of her middle-grade book, The Iron Trial, which is the first of the Magisterium series that is co-written with Holly Black.
via Cassandra Clare.