"Duffy's Single Corner: The Game of Checkers is an antique softcover book written by J.M. Duffy and published by F.R. Wendemuth in 1934. The book focuses on the game of checkers, providing players with tips and strategies for improving their gameplay. With its English-language text and vintage charm, this collectible book is perfect for enthusiasts of classic games and puzzles, offering a nostalgic glimpse into the past. Signs of handling, wear, yellowing, and tears on the spine. See photos.