The first book provides a mathematical foundation for wearable computing, together with practical illustrative examples and new methods of teaching the fundamentals. The emphasis of this book is on image based wearable computing, starting with the original motivation for wearable computing (as a means for computer-mediated imaging), and covering Augmented Reality, Mediated Reality, etc. fundamentals. See http://wearcam.org/textbook.htm
The second book provides a broader philosophical perspective intended for the layperson. This book summarizes more than twenty years of inventing, designing, building, and wearing computers in everyday life. It also touches on privacy issues of wearable computing, with a final chapter on anthrax preparedness in the context of the mass decontamination and experimental mailroom facility specifically built for use with wearable computers. The book follows roughly the subjects covered in the 35mm feature length motion picture film "cyberman". See http://wearcam.org/cyborg.htm