Apple Updates iPhone User Guide for iOS 6 and the iPhone 5
The iPhone can be very intimidating for first-time users, especially since Apple doesn't include a traditional manual in the box with the device. There is a large market for aftermarket books like the forthcoming iPhone 5 for Dummies, but Apple also offers a free iPhone Users Guide updated for iOS 6 both in PDF form and on iBooks.
The guides are excellent for customers new to the iPhone, and for the less tech-savvy iOS user. Download the guide through Apple's iBookstore [Direct Link] or as direct download as a PDF.