by Alan Rubin
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Fast and Faster (Yellow Umbrella Books)
Fantastic Rocks (Shutterbug Books: Scie...
Handbook of congenital malformations
Hazlo Mover!/ Make It Move!
How Many Fish? (Math)
How Many Fish ? (Yellow Umbrella Books)
Gödel, Escher, Bach
The Ambidextrous Universe
Nature's numbers
M. C. Escher Kaleidocycles
Key Curriculum Maths
Six not-so-easy pieces