The major PDF readers on all platforms are not designed around the concept of epublications; they’re built to read printlike documents in short spurts. Adobe might disagree with me on that point, but I’d merely have to point them to the page navigation user interface of Acrobat and Reader (see Figure 7-17). It almost looks like an afterthought, doesn’t it? No wonder the average person has such trouble navigating PDFs for long reading sessions. Basically they’re left with scrolling, which they hate doing for more than a few pages in nonlinear publications like magazines and catalogs and when referencing only sections of a book.