The purpose is to provide a theoretical and practical understanding of the interface between humans and robotic devices in general and the innovative intelligent walker in particular, which can enable safe and effective walking by people with various forms of neurological disabilities. Figures are plentiful and well done. This is a unique and specialized book focusing heavily on the creation and testing of the innovative robotic walker. The device itself is elegantly designed and thought-provoking, making for good reading. (Elliot J. Roth, Doody's Book Reviews, April, 2017)