NightShade by Andrea Cremer is about girl that has to decide between love for a boy and the love for her pack. Calla a 17 year old girl who is the alpha of a pack of high school wolves named the Nightshades, She has been the leader since she was a little girl but now she has to marry a boy named Ren he is the alpha of the Banes. These 2 packs have been fighting and the Marriage between them is suppose to help, plus the keepers (Wizards) want a pack to protect Haldis, a mysteries box that no 1 knows whats in it. Then this strange boy named Shay comes to town, he is suppose to fill a prophecy, they meet and Calla has to protect him. Shay lives with his uncle because his parents died when he was really young, his uncle is a bad guy that has a library full of books about the past war, and every Guardian (wolf that can switch from human to wolf in a few seconds). Ren gets Jealous of Shay and very territorial when it comes to Calla. Calla starts falling for Shay a forbidding love that can't be because she has a destiny and the wrong choice could be the end of her and everyone she ever loved.
I would recommend this book to anyone who likes to read it really is a good book. It is really long 454 pages but don't let that scare you.