Hidato Fun 5: 203 New Logic Puzzles, Paperback/Dr Gyora Benedek
Dr Gyora Benedek
Hidato Fun 7: 203 New Logic Puzzles, Paperback/Dr Gyora Benedek
Hidato Fun 6: 203 New Logic Puzzles, Paperback/Dr Gyora Benedek
Hidato Fun 2, Paperback/Dr Gyora Benedek
