Many people have been asking for official D&D PDFs, and WotC has been addressing the need for electronic reference materials at the table in various ways. According to Mashable, WotC is releasing a D&D Reader App this fall. It's not a PDF, but it's basically a D&D-specific Kindle-esque app for iOS and Android. Mashable reports that "Each book is broken up into different sections. So with, say, the Player's Handbook, you can tap on little thumbnails in your library to check out the introduction, a step-by-step guide to character creation, a rundown of races, individual sections for each character class, equipment, and all the other pieces that, together, form the D&D Player's Handbook."