A Thousand Pieces Of You - Claudia Gray - Paperback

The Firebird Trilogy, book 1 of 3, completed series

As the daughter of two brilliant physicists, Marguerite Caine grew up surrounded by wild scientific theories, always encouraged to imagine the improbable or even the impossible. But when her father is murdered, Marguerite's life is turned upside down. All the evidence points to one person, Paul, her parents' handsome, enigmatic protégé. Before the law can touch him, though, Paul uses Marguerite's mother's latest invention, a device called the Firebird, which allows people to leap into alternate dimensions, to escape.

With the help of another physics student, Theo, Marguerite chases Paul through various dimensions, determined to avenge her father. Her parents theorized that people who have met in one reality will be likely to meet in another, that key moments will heppen over and over, in different ways. But when Marguerite leaps into each new world, she meets another version of Paul that has her doubting his guilt and questioning her heart. Before long she realizes that what happened to her father may be more complex, and more sinister, then she ever dreamed.