The audiobook for the fourth novel in Cassandra Clare’s Mortal Instruments series will be read by Castle actress Molly Quinn and Gossip Girl actor Ed Westwick. Here’s a quick look at the two of them recording City of Fallen Angels, as well as a clip of Westwick reading the first chapter. Check it out below, and remember to sign up for the sweepstakes hosted by Simon & Schuster: A box set of audio CDs signed by Quinn and Westwick is among the prizes.