The 1957 "Knights and Castles and Feudal Life" book by Walter Buehr is a historical and illustrated work published by G. P. Putnam’s Sons in New York. The book, written in English, provides a detailed look at feudal life in the United States during the Middle Ages, focusing on knights, castles, and various aspects of historical significance. With original illustrations by the author himself, this collectible hardcover book offers a unique glimpse into the past, making it a valuable addition to any book collection.