I dove straight into this book and I read it in one go. I couldn't put it down, because it kind I amazed me. 
 I have to admit that it's a little difficult to get into it, especially if you are new to this whole world of Shadowhunters. But I was familiar with certain things, so I even recognized a few names. *cough* Lightworm *cough*. 
 So if you want to read those books, I really suggest you start with The Infernal Devices like I did. 
 But aside from that I really liked the book and I am already madly in love with some of the characters. I am really looking forward to reading the next book. 
 I didn't expect less from this book though. The Infernal Devices trilogy blew me off my feet and that's exactly what I hoped City of Bones would do too. I didn't get disappointed.