A Million Worlds with You (#3 Firebird)
Ever since she used the Firebird, her parent's invention, to cross through alternate dimensions, Marguerite has been at the center of a cross-dimensional feud. Now she has learned that the evil Triad Corporation plans to destroy hundreds of universes, using their ultimate weapon: another dimension's Marguerite who is wicked, psychologically twisted, and always one step ahead.
Praise for the Firebird series: -Deeply imaginative and totally enthralling. I loved the multiplicity of worlds and characters. A Thousand Pieces of You is epic!---New York Times bestselling author Lauren Oliver