作者的書籍：Jeff O'Hare - BookPine

Mathmania, Book 16

Mathmania, Book 16

Highlights for Children

Mathmania, Book 14

Mathmania, Book 14

Highlights for Children

Mathmania 15

Mathmania 15

Jeff O'Hare

Mathmania 14

Mathmania 14

Jeff O'Hare

Mathmania 16

Mathmania 16

Jeff O'Hare

Mathmania 12

Mathmania 12

Jeff O'Hare

Deadly Dreams Of Dr. Damage

Deadly Dreams Of Dr. Damage

Jeff O'Hare

Emperor Bog's Mind Bogglers

Emperor Bog's Mind Bogglers

Jeff O'Hare

Escape The Bogstar!

Escape The Bogstar!

Jeff O'Hare

Nature's Predators - Frogs and Toads

Nature's Predators - Frogs and Toads

Jeff O'Hare

Mathmania 10

Mathmania 10

Jeff O'Hare

Mathmania 11

Mathmania 11

Jeff O'Hare

Mathmania 5

Mathmania 5

Jeff O'Hare

Beastly Behaviors: Finding the Baffling Bonds Between Amazing Animals

Beastly Behaviors: Finding the Baffling Bonds Between Amazing Animals

Jeff O'Hare

Best Puzzlemania Mazes-#2

Best Puzzlemania Mazes-#2

Jeff O'Hare

The Best of Puzzlemania Mazes, Vol. 4

The Best of Puzzlemania Mazes, Vol. 4

Jeff O'Hare

The Best of Puzzlemania Mazes, Vol. 3

The Best of Puzzlemania Mazes, Vol. 3

Jeff O'Hare

Mathmania: Puzzlemania + Math (Ants/ Seesaw Cover)

Mathmania: Puzzlemania + Math (Ants/ Seesaw Cover)

Jeff O'Hare