What amazed me about InterWorld is how Gaiman and Reaves managed to tell a story full of science-fiction elements and concepts yet is quite accessible to any reader--young or old. The premise is simple and isn't anything new as sci-fi tropes are concerned: a kid with no sense of direction discovers he can travel the multiverse. Of course over the course of this short novel, various themes and issues are tackled without detracting from the story. The strength of the book, I think, are the characters. Joey Harker, the protagonist of the novel, is quite sympathetic and compelling, yet he's not the only interesting character. There's the mysterious Jay, the wise Mr. Dimas, and the various cast of villains. If there's any lacking in the book, it's the sense that there's something more. Once you finish reading InterWorld, you know it's begging for a sequel and that the journey has merely begun. The novel can best be summed up with the following words: simple language, big ideas, lovable characters, compelling story.