A Million Worlds with You - Claudia Gray

A million universes. A million dangers. One destiny.\n The fate of the multiverse rests in Marguerite Caine’s hands. Marguerite has been at the center of a cross-dimensional feud since she first traveled to another universe using her parents’ invention, the Firebird. Only now has she learned the true plans of the evil Triad Corporation—and that those plans could spell doom for dozens or hundreds of universes, each facing total annihilation.\n Paul Markov has always been at Marguerite’s side, but Triad’s last attack has left him a changed man—angry and shadowed by tragedy. He struggles to overcome the damage done to him, but despite Marguerite’s efforts to help, Paul may never be the same again.\n So it’s up to Marguerite alone to stop the destruction of the multiverse. Billions of lives