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Pilgrims and Troubadours   The account of a pilgrimage with guitar and tent, spanning 15 years, 34,000 miles (by bicycle) and 48 countries.

Pilger und Troubadoure (auf Deutsch) 

Deutsche Ausgabe des Buches ueber einer musikalischen Pilgerreise.  Enthaelt schoene farbige Fotos und Kunstdruecke der Gemaelde von Alexandra.

ISBN:  978-3-99053-022-1

Bestellung durch Glomer: https://www.glomer.com/kunst-kultur/literatur/biographien/pilger-troubadoure_10008831_16162

Bestellung durch ExLibris:  https://www.exlibris.ch/de/buecher-buch/deutschsprachige-buecher/dr-william-riggins/eine-besondere-pilgerreise/id/9783990530221

(The German language version of Pilgrims and Troubadours with beautiful color reproductions of photos and original artwork.)

Myth of the Calorie    A history of caloric theory in nutrition and an exploration of the question "What feeds us in our food?" Based on the author's doctoral dissertation

A Way Forward   A lively and insightful look at the threefold nature of the US Constitution, the principles of liberty, equality and fraternity, and burning questions facing modern government and society.