Warlock by Wilbur Smith

Hidden away in the vast and forbidding deserts of North Africa, Taita has passed the years since the death of his beloved Queen Lostris in prayer and study and has become the Warlock.
Now he answers the summons from the beyond. He leaves the desert vastness and returns to the world of men, to find himself plunged into a terrible conflict against the forces of evil which threaten to overwhelm Egypt.
Rich in colourful detail, Wilbur Smith brings to life the world of ancient Egypt in a masterful feat of storytelling.