Unlike previous editions of the pocket reference, this fourth edition has 30% more pages and now includes the entire singles chapter of the EDR, complete with photos. This more portable, compact version of the 4th edition EDR is coil bound so it will lay flat while in use. It's 5"x6.5" format fits neatly in purse, pack or briefcase. In addition to the large Personal Usage Chapter from the EDR, this pocket version also includes chapters on Safety, Applications, Raindrop Technique, Vita Flex, Emotional Response, and - for the first time - the complete Singles chapter with photos.