In Spidersilk the novel, the main character Mark helps his friend fight off intruders from another dimension. These two dimensions are the more obvious in the book, but the author also adds in more. From the videogame world that sounds incredibly close to ours (Olympia, Washington and so on), to the dream realm, spider realm and other dimension Mark keys into, it’s enough to leave you baffled and feeling incredibly small. Such a vast amount of dimensions are only the beginning though. Many scientist believe there are infinite parallel universes connected to ours. Imagine, billions of “you” leading similar but different lives. Check out this video for more:

http://ed.ted.com/lessons/how-many-universes-are-there