I'm from Nowhere — Suzanne Myers

It's always been just Wren and her mother, Hannah. But when Hannah receives a reporting assignment in Greenland, Wren is shipped to Hardwick Hall, Hannah's alma mater, the boarding school she's refused to discuss for as long as Wren can remember. After Wren is unsuccessful at befriending her stuck-up suitemate, Honor, she finds an escape in riding horses and in hanging out with cute rowers, like the adorably crinkly-eyed Nick. She finds her niche in the campus's underground music scene with Chazzy, a darkly hilarious fellow musician. But soon clues about her mother's dark past threaten to destroy Wren's new life.