101 Puzzles in Thought and Logic by C. R. Wylie, Jr. Solve murder problems and robberies, see which fishermen are liars and how a blind man can identify color — purely by reasoning! Hours of mind-strengthening entertainment.
Origami from Angelfish to Zen by Peter Engel Brief history, basic techniques, and step-by-step instructions for 24 projects: hummingbird, giraffe, butterfly, kangaroo, more.
Rediscovered Lewis Carroll Puzzles by Lewis Carroll, Edward Wakeling 42 mathematical mind-benders: Castle Croquet, A Sticky but Polished Riddle, Who's Coming to Dinner?, A New Way to Pay Old Debts, Feeding the Cat, and more. Solutions.
