#10 Lily Blue, Blue Lily by Maggie Stiefvater

Third in The Raven Cycle series.

Quote
Blue Sargent has found things. For the first time in her life, she has friends she can trust, a group to which she can belong. The Raven Boys have taken her in as one of their own. Their problems have become hers, and her problems have become theirs.

The trick with found things, though, is how easily they can be lost.

This writer does a nice job of focusing on a different character's POV for each installment of the series.