City of Ashes.

*I cannot review this book without there being spoilers about the first. If you have not read City of Bones and don't want to know some major stuff that happened, don't continue with this review until after you have read the first.*

  "Clary Fray just wishes that her life would go back to normal. But what's normal when you're a demon-slaying Shadowhunter, your mother is in a magically induced coma, and you can suddenly see Downworlders like werewolves, vampires, and faeries? If Clary left the world of the Shadowhunters behind, it would mean more time with her best friend, Simon, who's becoming more than a friend. But the Shadowhunting world isn't ready to let her go -- especially her handsome, infuriating, newfound brother, Jace. And Clary's only chance to help her mother is to track down rogue Shadowhunter Valentine, who is probably insane, certainly evil -- and also her father." - Goodreads

  I was planning on reading another book after I read City of Bones, but when I finished CoB I couldn't wait. So I went right into the second Mortal Instruments book. And now I have to wait til I can get to the store to buy City of Glass. Urgh. I hate waiting...especially to get books that are in series.
  The tension between everyone in this book is great.  Jace and Clary can't seem to let their feelings go, even though they were told they are supposedly "brother&sister." After Simon kisses Clary he starts referring to himself as her boyfriend, which comes off as very selfish what with everything she is trying to deal with. Especially with the huge change that Simon goes through that will complicate things between them even more if he keeps pursuing her.
  Alec is dealing with his own relationship troubles.
  Valentine is up to some tricks again. He has stolen the Soul-Sword and is planning on using it in some way to over-throw the Clave.
 Clary's mother is in a coma and nothing her or Luke do seems to help.
 After Jace has a run in with Valentine the Inquisitor is called in to test whether he is lying or not about being a spy for Valentine. But she needs the Soul-Sword to do that and she finds it very suspicious that Valentine steals it right when it is needed. She seems to really hate Jace, like she has a personal vendetta against him. Isabelle and Alec's mom doesn't believe that Jace isn't helping Valentine either. So much drama.
  I loved Jace in this book. Well, I loved him the first one, but his character development in CoA was great. Every single thing he thought he knew about himself turns out to be a lie and he's not sure how to deal with it. Even though he puts on the tough guy facade there are some scenes where he is just broken.

  I have many many doubts that Jace and Clary are actually brother and sister. Too many hints were dropped by multiple characters. Hopefully in City of Glass Clary's mom wakes up and straightens it all out for them.

  My favorite scene is when Jace is in the Silent City. The fear is intense and it's just so emotion-filled it really stays with you.
Definitely 4/5 for this book. This is a good read for the YA Fantasy lover.