A Million Worlds with You is the captivating conclusion to the Firebird Trilogy by New York Times bestselling author Claudia Gray. In this gripping novel, Marguerite finds herself at the center of an interdimensional conflict that holds the fate of the multiverse in her hands. After using the Firebird, her parents' invention, to travel through alternate dimensions, she faces a threat from the evil Triad Corporation. They plan to destroy countless universes by using an alternate version of Marguerite as their ultimate weapon. This alternate Marguerite is not only evil but also psychologically manipulative and always one step ahead. Marguerite must confront this challenge while also grappling with the changes in her relationship with Paul, who has been altered by the Triad's recent attacks. The novel offers an exciting blend of adventure, intrigue, and emotional conflict that will keep readers captivated until the very last page.