The final part of Tallitha's journey is underway. She must now unravel the last secret of the Morrow Swarm and their dark spell, or face the terrible consequences that await her. With the support of her friends and through the sheer strength of her will, Tallitha confronts the perils of the Northern Wolds and comes to terms with the greatness of her own magic. Will this be enough for her to free them from the greed and corruption of the Swarm? Or is Tallitha's only choice to sacrifice herself in order to save those she cares for the most? The Dark Spell is the third and final instalment in Susan McNally's gothic trilogy.