Moon Over Marisol. Book 18: The Exam One final moon. One final assignment. One final chance to come home. After so many impossible assignments across time, magic, and memory, Marisol faces the one task she never wanted to see: Pass the Final Exam. With Tibby at her side and thirty-eight hours on the clock, Marisol is pulled into a strange old classroom where the rules are microscopic, the instructor is maddeningly familiar, and every question sends her back through the moons that changed her forever. From haunted forests and broken bridges to penguins, puzzle pieces, unicorns, and old friends she never thought she'd see again, every answer brings her closer to the truth of what the journey meant. Some endings arrive with silence. This one arrives with a green check in the sky. The final moon begins.