In short: Clockwork Angel by Cassandra Clare is a superb introduction to The Infernal Devices Series and presents us with a whole new cast of extremely well developed and wonderful main and side characters. 
 I was admittedly a bit doubtful going into Clockwork Angel thinking that Cassandra Clare wasn't going to be able to set this one apart from her The Mortal Instruments Series. The characters sounded very familiar to the ones we see in TMI, for example. I know now that I should have known better. After all, my favourite part of TMI is the characters so I should have known that Clare was completely capable of creating a new batch of unique and loveable characters in The Infernal Devices. 
 Well, mostly loveable. Will is going to take some warming up to. Whereas Jace, though arrogant at times, openly shows affection to the people he loves, Will pushes everyone away from him but Jem. Also, Jace is never cruel, not like Will. And yet, I'm still incredibly intrigued as to what exactly is causing Will to behave in such a jerkish manner. I can't wait to learn more. Other than Will and his frustrating moments, I can't stress enough how much I loved the main and side characters of Clockwork Angel - each with their own well defined personalities, back stories, and mysteries. 
 And Magnus! 'Nuff said. Yeah, Magnus gets his own paragraph. 
 Something else that I loved that I would be remiss if I didn't mention is the setting: Victorian London. I would never have called myself a fan of historical fiction before this; I usually make every effort and excuse to avoid it. But Clockwork Angel may have made me a new fan! Clare really brings the setting alive with perfectly plotted and fascinating details, deftly recreating what Victorian London was like. As a historical fiction amateur, I never got lost or confused in facts or language. Really well done! 
 Overall, Clockwork Angel is a superb first book the The Infernal Devices Series and an amazing prequel to The Mortal Instruments Series. This was my first foray into the steampunk genre and I have to say, I enjoyed that aspect of the novel very much as well! The clockwork automatons were just insanely creepy. Oh, and if anyone asks, I'm Team Tessa :) Very much looking forward to Clockwork Prince coming out August 2011. (And City of Fallen Angels coming out tomorrow, of course!!).