It's put together in such a way that you can print it out two pages/sheet and double-sided, cut the pages in half and then bind them together in a regular-size booklet instead of having a big unsightly stack of 8½x11 pages.
Of course it helps if you have access to reprographics equipment, which can bind them with something like thermal binding such as fastback and trim them up nice and neat. Still, this manual is thin enough that you can bind it with heavy-duty staples instead. At right is the copy I made from the reprographics PDF.
Maybe most people won't be interested in the reprographics PDF, but it's available for anyone who wants a manual like what came in the box.