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Kenken: A Puzzle A Day!: 365 Puzzles That Make You Smarter - (Kenken: Math & Logic Puzzles That Will Make You Smarter!) By Robert Fuhrer (Paperback)

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Math Puzzles & Brainteasers, 6-8 - (Math Puzzles And Brainteasers) By Terry Stickels (Paperback)

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The Colossal Book Of Mathematics: Classic Puzzles, Paradoxes, And Problems

Challenging Math Puzzles

The Big Puzzle Book Of Area Mazes: 300 Mind-Bending Math Puzzles In Five Challenge Levels (Original Area Mazes)