Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Valuable History

A book to have, along with "Physique Pictorial" and "Hollywood Nudes", to appreciate the history and background of male bodybuilding and nude male photography. David Chapman's excellent text provides a crash course on the development of male bodybuilding from the slightly obese strong men of mid-19th century carnivals and fairs to the sudden and revolutionary switch to more defined and muscular "strong men". In the book are priceless photos of the great Eugen Sandow and Tony Sansone. The photos of Tony Sansone alone are worth the price of this book. Important historical document.