Pyrgic Puzzlesde Christopher MaslankaEdiciones (1)Pyrgic Puzzles (2006)Guardian Newspapers Ltd · ISBN 9780852650707Más obras de Christopher MaslankaThe pyrgic puzzlerUUniversity of the MindUniversity of the MindPProfessor Percival Pinkerton's most perplexing puzzlesProfessor Percival Pinkerton's most perplexing puzzles
PProfessor Percival Pinkerton's most perplexing puzzlesProfessor Percival Pinkerton's most perplexing puzzles