Parallelogram (Book 1: Into the Parallel)
by Robin Brande
High school science genius Audie Masters uses her knowledge of quantum physics to find a way into a parallel universe, where she discovers a parallel version of herself who is leading a much more exciting life. Soon Audie has a taste of that life, too, full of adventure, romance, and intriguing new mysteries of science. It's all more than she could have hoped for--until something goes wrong.