The "Keeper of the Lost Cities" series by Shannon Messenger is a captivating fantasy saga that follows Sophie Foster, a young girl with extraordinary abilities, as she uncovers hidden truths and navigates complex challenges in a magical world. The two-book collection you're interested in includes: 1. Stellarlune (Book 9): In this installment, Sophie and her friends delve deeper into the mysteries of their world, confronting new adversaries and uncovering the true meaning of power and evil. As tensions rise, Sophie faces impossible choices about whom to trust and when to act, leading to revelations that could change everything. 2. Unraveled (Book 9.5): Told entirely from Keefe Sencen's perspective, this narrative explores his journey after he leaves Sophie and their friends to protect them from his unpredictable powers. As he ventures into the Forbidden Cities, Keefe seeks answers about his past and grapples with staggering truths that could alter his destiny and the fate of those he holds dear.