** spoiler alert ** 
 Someone has been killing and draining Downworlders dry. Although the motive remains unknown, the Children of the Night are immediately suspected of the killings and deny having anything to do with it. Meanwhile, the Inquisitor is coming to pay the Shadowhunters a visit and more importantly, to question Jace. Although this is her supposed goal, it isn't long before she tosses him into a cell in the Silent City and while he's there, the Soul-Sword is taken from the Silent Brothers. Needless to say, things pick up in City of Ashes and the plot certainly picks up speed. Did I mention that Simon meets with an interesting almost end twice in this book? Seriously, I had a serious "No way! They can't kill him off!" moments. And well, you'll have to read it to understand what I mean--because you aren't getting me to spill that spoiler! 
 Meanwhile, I really did enjoy reading City of Ashes and well, I'll definitely be picking up City of Glass the next time that I hit up a bookstore! No, really, I want to know what's going to happen next and I really shouldn't have read the first chapter of City of Glass that they have at the end of City of Ashes because I'm now suffering from 'oh my goodness, what happens next!?' syndrome. Also, I love Clary's ability with the Marks--although again, won't say more than that. And then there were references to Naruto (which admittedly is not my favorite shounen manga/anime), World of Warcraft (yes, I do play), and Dumbledore. Oh! And I love how Clary and Jace's relationship is evolving! Don't get me wrong, I feel horrible for Simon, but I'm still rooting for Clary/Jace even though yeah, it is technically 'wrong' to do so. So don't mind me, I'm busy speculating about how the two of them are apparently different from one another--asides from the obvious (genders, age, and who they were raised by). No, really, there's a line in City of Ashes that will make you wonder--something I won't/can't tell you--about Jace that the Inquisitor says. 
 Anyways, if you enjoyed City of Bones--like I did--then you'll want to pick up City of Ashes if you haven't already (and while you're at it, if you can, pick up City of Glass too).