***SPOILER ALERT!!!*** 
 Tessa Gray's brother sends her tickets to London where he will be waiting for her to live happily ever after, as a family. Since they are orphans they need to stick together. What she doesn't know is that everything is a trap, an evil trap. 
 She is kidnapped by the Dark Sisters, who are Warlocks, and train her to control her power. What is her power? She's Clay. Simple as that. 
 After being rescued by one of the Shadowhunters, Will Herondale, she discovers who she is and what they want with her. Trying to rescue her idiot brother -who turned out to be and asshole- she falls in love with Will. You know that rule that Shadowhunters can only marry other shadowhunters? Well she doesn't know this, and James -who is dying- understands her comepletely and tries to help her himself. Having a crush on her, as his bestfriend Will has as well. 
 The book is amazing. Fast pacing, thrilling, and mysterious. It will only make you want for more!