Series: The Bound Ones
Author: Tricia Barr
Bound by an ancient spell and hunted by the cult that cast it, four strangers-turned-best-friends struggle to master their elemental powers to free themselves once and for all.
Titles in the series:
Lily has been taken, and Phoenyx and the others have five days to save her, and themselves. But Phoenyx has a new friend, Ayanna, who has the power to bring back the memories from all of Phoenyx's past lives. The knowledge that is unlocked sends the Bound Ones on a several-millennia-long journey for an ancient artifact that might free them once and for all. Can they find it in five days, or will they all face death once again?