The Push Hands Workbook ,is available from Amason.
" This workbook is a step-by-step guide to push hands (t’ui shou). These T’ai Chi Chuan two person exercises are the foundation of the self-defense skills of the art. Written for the beginner through advanced practitioner and teachers, this book presents fun exercises and games that train sensitivity and responsiveness. Specific component skills of push hands (eg. sticking, listening, neutralizing, pushing, rooting etc) are systematically developed through sequential drills presented in the workbook. Important topics that are often poorly addressed in the English literature are explained in clear language and paired with activities. 50 exercises clearly explained with more that 180 photos." Written by Nando Renolds(http://www.nando-r.com/MN.asp?pg=pro200). Sounds interesting.