Can't Go Back (Teen Wolf, Book Four, Worlds Colliding Series)

Stacie Stilinski is trying to find an anchor as a way to lessen the pain of being an anchor of three people, and certain slightly tempting situations force her into finding an anchor soon.
Ari Martin is no longer with Isaac, but is willing to believe that everything will become right again when she gets a chance to do something she's been wanting to do for a long time, reviving herself.
Tara Hale is freshly out of being imprisoned by the Calaveras, an experience that allows her to rethink her relationship with Scott, trying to make everything better.
Natalie Lahey is reforming herself back into the Natalie we knew and loved before Boyd died now that her brother is gone, she has a new job, and possibly a new love interest that she doesn't know what to do with.
Adriana Martin is willing to put a hold to reviving herself to help the best of her friends revive themselves.
Angelique "Angel" Fain was introduced last book/season. She's a supernatural creature, but she doesn't know which kind. Her relationship with Kira is messy and complicated, mostly due to the fact she's addicted, and that her parents don't trust her or what Kira to be around her. She's sassy, care-free, but sweet and caring at the same time. She's independent and is a skater :) You don't know her.