I really enjoyed this book, but did find myself asking two questions at the end of it. 1) Was it explained how the "boxes" showed up in all the worlds he visited? Did they just appear, and if so, nobody thought that was weird? And 2. Wouldn't there also be an infinite number of his "real worlds" (representing the various things that could've happened since Jason2 took over)? Couldn't each Jason just find a new one?