Eighth day trilogy

"Orphan Jax Aubrey doesn't expect much on his thirteenth birthday, but when he discovers there's an extra day squeezed between Wednesday and Thursday whose origins are rooted in Arthurian legend, it's clear his lfe will never be the same"-- Provided by publisher.

"The battle between Kin and Transitioners that's been brewing for centuries has finally come to a head. The sinister Kin have captured Evangeline's younger sister, Addie, a descendant of Merlin whose presence will allow them to reverse the Eighth Day Spell and free themselves. Addie doesn't realize the full consequences of her cooperation. She's been helping the Kin because they value the strength of her magi--something Evangeline never did. The feeling...