Robin Brande 
Into the Parallel [EPUB ebook] 

NO ONE IS GOING TO BELIEVE ME.
High school senior and amateur physicist Audie Masters has discovered what no other physicist has been able to prove: that parallel universes do exist, and there is a way to journey into them. She also discovers something else: a parallel version of herself, living the kind of life Audie never could have imagined for herself.
Now Audie is living that life, too, full of adventure, romance, and reality-bending science. It’s all more than she could have hoped for—until something goes wrong.
First book in the Parallelogram Quartet.
Don’t miss the other books in the Parallelogram Quartet:
Caught in the Parallel
Seize the Parallel
Beyond the Parallel