The pyrgic puzzlerde Christopher MaslankaMateriasPuzzlesLogicEdiciones (1)The pyrgic puzzler (2011)Dover Publications, Inc. · inglés · ISBN 9780486484532Más obras de Christopher MaslankaUUniversity of the MindUniversity of the MindPProfessor Percival Pinkerton's most perplexing puzzlesProfessor Percival Pinkerton's most perplexing puzzlesThe Pyrgic puzzler
PProfessor Percival Pinkerton's most perplexing puzzlesProfessor Percival Pinkerton's most perplexing puzzles