The 20 MB guide is compatible with iPads as well as Macs running
iBooks on OS X Mavericks, and it takes advantage of the app with
inline video playback, two-page page layouts, and built-in
annotations (plus, of course, font size and color controls for
It looks like Apple did a nice job in converting the guidelines to
iBooks, and annotations appear to be especially useful for
developers and designers learning the principles of the iOS 7
Nice work from Apple.