I'm a librarian who loves anime, manga, and reading a wide variety of genres.
Every time things go wrong for these people, I have more fun. Now they may be(show spoiler)
So far, I consider 14 to be the better book, because part of the fun there was that a supposedly normal place, an apartment building, was gradually revealed to be very strange. Here, "strange" is technically normal - the Door is designed to help people travel great distances in only a single step. The main problem is that it doesn't always work as advertised. It's been frustrating to me (and to Mike, the main character) that the scientists involved don't seem to be too concerned with figuring out the exact reasons why the Door doesn't always work the way it should. I mean, if planes worked 99% of the time, but 1% of the time they either refused to move or got into the air just fine but then dropped out of the sky (I don't actually know how often planes malfunction, so I'm making percentages up), people would probably be pretty unhappy if no one was interested in figuring out the reasons behind the issues in the 1% portion.