The Dark Army (Starblade Chronicles)

Thomas Ward is dead. Devastated by his loss, his apprentice Jenny and the witch assassin Grimalkin are ready to abandon the war and return home. Yet in the struggle between light and dark, not everyone who dies stays dead. Soon a newly resurrected Tom Ward finds himself standing across the battlefield from Alice, a witch who has aligned herself with the dark; a witch he once loved. The return of a powerful old enemy could put Tom and Alice on the same side once more - if only Tom can find a way to trust her.