New York: Mason/Charter. 1977. dj. Hardcover first edition - Biography of the American inventor, generally considered the inventor of the steamboat, but in reality, while he was not the first to come up with a 'steamboat,' he was the inventor of many other things - including primitive submarines which he called "plunge boats", torpedoes, marble cutting machines, etc - and his contribution to the history of the steamboat was even more important than that of an inventor - he convinced the public that the - and the use of canals - were efficient and safe means of transport. Illustrated. Notes, bibliography, index. 235 pp. ISBN: 0-884054381.

Boston: Houghton Mifflin, 1999. dj. Hardcover first edition - An account of his journey from the Atlantic to the Pacific using inland waterways of the United States - a trip which covered 5000 miles - more than any other cross-country river traveler has ever managed, and which often retraced the journey of some of our most famous explorers from Henry Hudson to Lewis and Clark Maps, photographs. xii, 506 pp. Illustrated endpapers. ISBN: 0-395-636264.

Boston: Houghton Mifflin, 1999. dj. Hardcover first edition - An account of his journey from the Atlantic to the Pacific using inland waterways of the United States - a trip which covered 5000 miles - more than any other cross-country river traveler has ever managed, and which often retraced the journey of some of our most famous explorers from Henry Hudson to Lewis and Clark Maps, photographs. xii, 506 pp. Illustrated endpapers. ISBN: 0-395-636264.

Boston: Houghton Mifflin, 1999. First edition - An account of his journey from the Atlantic to the Pacific using inland waterways of the United States - a trip which covered 5000 miles - more than any other cross-country river traveler has ever managed, and which often retraced the journey of some of our most famous explorers from Henry Hudson to Lewis and Clark Maps, photographs. xii, 506 pp.

Boston: Houghton Mifflin, 1999. SIGNED first edition - An account of his journey from the Atlantic to the Pacific using inland waterways of the United States - a trip which covered 5000 miles - this except includes Part VII - the Lower Missouri River. Double page schematic of the 'Nikawa.' SIGNED on the title page. 31 pp.

Boston: Houghton Mifflin, 1999. SIGNED first edition - An account of his journey from the Atlantic to the Pacific using inland waterways of the United States - a trip which covered 5000 miles - more than any other cross-country river traveler has ever managed, and which often retraced the journey of some of our most famous explorers from Henry Hudson to Lewis and Clark SIGNED on the half title page. Maps, photographs. xii, 506 pp.

Boston: Houghton Mifflin, 1999. SIGNED first edition - An account of his journey from the Atlantic to the Pacific using inland waterways of the United States - a trip which covered 5000 miles - this except includes Part VII - the Lower Missouri River. Double page schematic of the 'Nikawa.' INSCRIBED on the title page. 31 pp.

New York: The Free Press, 1998. dj. Hardcover - The story of the mysterious friendship between Leonardo da Vinci and Niccolo Machiavelli that changed history and almost accomplished one of the most ambitious plans of the city-state of Florence (Leonardo's concept to build a system of canals that would make the Arno River navigable from Florence to the sea, a project begun in 1504.). Roger Masters, a distinguished historical scholar, reconstructs this project and its failure, fills in many details of the relationship between the two giants of the Renaissance, and raises tantalizing questions on how history might have taken a different course had the project succeeded. Masters's reconstruction is both fascinating and plausible. Illustrated. Extensive notes, sources, index. 278 pages. ISBN: 0-684-844524.