Magic for a price : an Allie Beckstrom novel

"For most of her life, Allison Beckstrom has used magic and accepted the heavy price it exacts. But now that all magic is poisoned, it's no longer just using people--it's killing them. With Portland about to descend into chaos, Allie needs to find a way to purify the wells of tainted magic beneath the city. But the only options left to her are grim: attempt to close down magic forever, or follow her father's plan to set magic into the right hands...