Into The Doorways by P.S. Winn

If you could step through a Parallel doorway, you would find the world of Terrene. In this world, scientists have already learned how to open those doorways and travel to the parallel worlds. At first they traveled to visit and learn about other worlds. Now though, a tragedy is forcing them to look at the parallel worlds and head through the doorways for other reasons and they have to hurry.

Genre: Nonfiction, Science, Experiments, Instruments & Measurement, Experiments & Projects, Post-Apocalyptic