Ensnared Splintered series, book 3.

After surviving a disastrous battle at prom, Alyssa has embraced her madness and gained perspective. She's determined to rescue her two worlds and the people and netherlings she loves, even if it means challenging Queen Red to a final battle of wills and wiles ... and even if the only way to Wonderland, now that the rabbit hole is closed, is through the looking-glass world-a parallel dimension filled with mutated and violent netherling outcasts....