The book traces the development of human-powered two- and multi-wheeled machines from early walking-propelled designs through later bicycle, tricycle, and unicycle forms; it surveys inventors and early models, patents and manufacturing debates, and compares notable contemporary makes. It offers practical guidance for buyers and beginners, discusses construction and varieties—including machines adapted for women—covers riding schools, rinks, and racing, and collects period literature, statistics, and medical opinions on health effects. Illustrated descriptions and measured comparisons aim to inform readers about selection, maintenance, and riding practice as velocipedes grew from novelty to everyday conveyance.