Witch & wizard 3 - James Patterson

Whit and Wisty Allgood have sacrificed everything to lead the resistance against the merciless totalitarian regime that governs their world. Its supreme leader, The One Who Is The One, has banned everything they hold dear: books, music, art, and imagination. But the growing strength of the siblings' magic hasn't been enough to stop the One's evil rampage...Wisty knows that the time has finally come for her to face The One. But her fight and her fire only channel more power to this already invincible being. How can she and Whit possibly prepare for their imminent showdown with the ruthless villain that devastated their world-before he can truly become all-powerful?