(Book 1 of 4) 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.

(Book 2 of 4) What went wrong? EVERYTHING. High school senior and amateur physicist Audie Masters’ cutting-edge science exploration has helped her do what no other physicist has done before. She found a parallel universe—along with a parallel version of herself. That discovery has catapulted her into the adventure of a lifetime. Now all she has to do is survive it.

(Book 3 of 4) Parallel universes have their own rules. High school senior and amateur physicist Audie Masters has done what no other physicist has done before her: discovered a parallel universe. She’s also found a parallel—and very different—version of herself. Now what? As Audie struggles with the dangerous effects of traveling to a parallel universe, now she wonders if she’s gone too far. Can what she did be undone? Will she ever reclaim her life as it used to be?

(Book 4 of 4) Everything has to change. My life depends on it. High school senior and amateur physicist Audie Masters isn’t simply pursuing science anymore. Her discovery of parallel universes and time travel have now led to a race for Audie to save her own life before it’s too late. From award-winning author Robin Brande comes the exciting, mind-bending conclusion to the Parallelogram series. You’ll never look at the universe or your own life the same way again.