With each new iOS release, Apple typically makes available the accompanying user guide through the Manuals section of its website. With the advent of iBooks and the iBookstore, the company started reformatting these manuals for the iPhone, iPod touch and iPad devices, making them available as free downloads on the iBookstore.
As we count the remaining hours until today's iOS 7 release, we've just spotted the official iOS 7 manual on the iBookstore...