Shadowmancer (Shadowmancer #1) by G.P. Taylor

Obadiah Demurral is a sorcerer who is seeking to control the highest power in the Universe. He will stop at nothing. The only people in his way are Raphah, Kate, Thomas and the mysterious Jacob Crane. This work takes you into a world of superstition, magic and witchcraft, where the ultimate sacrifice might even be life itself.