What if you could not only travel any location in the world, but to any possible world? That is the central conceit of this anthology. Or, to be more precise, it aims to collect the best stories that fall into one of two categories: parallel worlds stories or portal fantasies.
A portal fantasy is a story in which a person from one world (usually the “real” world) is transported to some Other World (via some magical or unexplained means), usually one full of impossibilities and generally much stranger than the one they come from.
A parallel worlds story is one in which a person from one world (usually the “real” world) is transported to some Other World (via some scientific/technological means), usually a parallel universe/alternate reality either just slightly different than the one they left, or else vastly different, with different physical laws, but strictly scientifically plausible.
As you can see from the parallels in those two descriptions, the portal fantasy and the parallel worlds story are essentially two sides of the same coin; heads, you get fantasy, tails you get science fiction, but in each the characters’ journey is essentially the same: to explore and wonder at these strange Other Worlds…or to do their damnedest to get back home.
When I first set out to assemble this anthology, I had been thinking primarily of parallel worlds fiction, until the above realization occurred to me. Once it did, I knew that if I were to consider one side of the coin I had to also consider the other, and at that point the entire anthology clicked into place.
(Accordingly, it felt to me like the two types of story should be in dialogue with each other in the context of the anthology, so I did not separate them in the table of contents; instead, both types of story are mixed together throughout the book. It should also be noted that I shied away from including any stories that are primarily based on time travel—as time travel stories are their own genre, though of course time travel does, in essence, create parallel worlds.)
The tropes of Other Worlds fiction have fired the imaginations of millions of readers over the years. The portal fantasy has the earliest roots, with prominent early examples including The Wonderful Wizard of Oz, Alice’s Adventures in Wonderland, and The Chronicles of Narnia. The tradition has continued, with modern day writers picking up the torch, such as Stephen King (The Dark Tower), Philip Pullman (His Dark Materials), and Lev Grossman (The Magicians).
Although one might assume that parallel worlds stories are of a more recent vintage, the hypothetical idea of multiple universes has actually been around since the late nineteenth century, and, indeed, some early examples of parallel worlds fiction can be found in the works of science fiction’s most prominent early practitioner, H. G. Wells. (However, it is fair to say that the majority of this type of story has been written after the many-worlds interpretation theory of quantum mechanics was first postulated and popularized in the late ’50s.) For parallel worlds stories, there are fewer obvious classics to reference, but there are The Gods Themselves by Isaac Asimov, The Female Man by Joanna Russ, and The Big Time by Fritz Leiber, with recent examples including The Neanderthal Parallax trilogy by Robert J. Sawyer, The Mirage by Matt Ruff, and Alastair Reynolds’s Absolution Gap.
(For more Other Worlds novel-length works, see the “For Further Reading” appendix located at the end of this anthology.)
So let’s take a trip through the looking glass… or into the universe next door. Thirty different Other Worlds await you; to visit the first, simply turn the page…