Author: A.N. Willis
Genre: Science Fiction, Young Adult
Published on: June 23, 2015 by Alloy Entertainment
Infinite worlds. Endless possibilities . . .
Stel Alaster has never known life without the Corridor. It appeared suddenly seventeen years ago, the only portal to a parallel version of our world—Second Earth. Everyone on First Earth fears Mods, the genetically modified Second Earthers who built the Corridor. They are too smart, too strong, and have powers that can’t be controlled. Any Mod found on First Earth is branded, then detained in the Corridor’s research labs.
Only Stel has a dangerous secret. She has a power, too: She can open a portal to Second Earth . . . and several other parallel universes she’s discovered. If anyone ever finds out, she’ll be imprisoned, no better than a Mod or common lab rat.
But when the Corridor starts to fail, emitting erratic bursts of energy that could destroy First Earth, Stel must risk everything to save the people and world she loves. With the help of an escaped Mod and an infuriatingly arrogant boy from a third universe, Stel sets out to unravel the mysteries of the Corridor and stabilize it before it’s too late. The fate of every world lies in the balance. . . .
I've never actively searched for parallel universe sci-fi novels, but I've read a bunch of them. The Corridor is one of those. I found this book while browsing the Kindle store. The synopsis sounded compelling, and I liked the cover art. The Corridor's main character is Estele "Stel" Alaster. She's a girl in her late teens who lives in a world very like ours. The difference is that its people know that parallel realities exist. Almost two decades ago, a sphere portal they called the Corridor opened without warning. It leads to Second Earth, a place that used to be far more technologically advanced than Stel's home. The Corridor ravaged Second Earth, though, so the people of First Earth have been helping them since the opening of the portal.
When the story begins, Stel is doing schoolwork in the observation area near the Corridor. As her father is Chair of the Corridor Facility, they both live in the compound. The portal suddenly acts up, and in the aftermath Stel ends up with a special power. She can open up her own temporary portal, which lets her visit other worlds. Yes, it doesn't take Stel long to discover that there are more parallel worlds besides Second Earth. Unfortunately, the Corridor's flare up had other consequences. Beyond damaging the Facility's structure, it caused Dr. Alaster to lose his post. Stel has a best friend named Lissa, whose scientist mother became the new Chair. This drove a wedge between the two friends.