Apollyon takes place after the events in Elixir, which tells the story from Aiden’s point of view. Apollyon returns to Alex’s point of view, and it will make sense from her perspective, but if you’d like to know what happened between Deity and Apollyon, Elixir is available as a free download from the Spencer Hill Press website. It can also be purchased as an e-book and in a trade paperback edition.