My favorite part of the book was meeting all of the fantastical characters in the faerie realm. I loved the way the faerie queen's trick on Clary moved the entire plot of the novel forward.
I was intrigued with the Nephilium runes from book one. The angels carve them into their skin to internalize the power of that particular rune. A healing rune helps you heal quickly. A fearless rune gives you courage in battle. I loved this aspect of the angels, especially when Clary discovers that she can create new runes that no one has ever seen before.
I read the entire book in a weekend because I couldn't put it down. Luckily I bought the third book, so I could immediately carry on with the series.
This is a great choice for a long weekend, especially if you love romance suspense, and fantasy.