The curses : a Graces novel
(Book)

The youngest of the Grace siblings, Summer, calls on the coven to help with a secret she has uncovered, while Wolf's behavior becomes unpredictable and, perhaps, threatening.

Summer, the youngest Grace, has a knack for discovering the truth. After a trail of clues leads her to what could be the key to both her family's mysterious past and the secret of Wolf, she's determined to vanquish yet another curse. At her behest the coven comes back together, reluctantly drawing their erstwhile friend River back into the fold. But Wolf's behavior becomes unpredictable even as Fenrin's strength fades. Now Summer must ask herself whether the friend she so loves is also planning her family's ultimate, cursed demise. -- adapted from goodreads.com info