Purpose by Kristie Cook is a continuation of the Soul Savers series. Seven years have past since the conclusion of book one and Lexi is a shadow of her former self, missing the half that makes her whole. In my opinion, Purpose fell short of the first novel, Promise. As with the first novel, I felt like one of the main antagonists, Vanessa, was very similar to an antagonist in a popular series. I drew the same parallel between Lexi and Tristan in book one. All in all a good read, but would like to see some character development and a deeper plot unfold in the next installment.