|A sweet little book by an author who wanted to be a math
teacher and hopes he can "introduce the joy of learning
mathematics to every student in this world through this story".
A little girl named Katie who enjoys learning mathematics from
her father finds herself in a mysterious land. However, the
inhabitants are not the silly fantastical creatures of
Wonderland. Instead, they are famous mathematicians (Newton, von
Neumann, Halmos, etc.) who have apparently been brought there by
another young girl who calls herself "The White Witch" and are
forced to answer mathematical puzzles if they want to return to
their homes. Moreover, unlike Alice, they need not fall down a
magical rabbit hole and drink magic potions to get there.
Instead, their journey is (vaguely) explained in terms of terms
of four-dimensional geometry. All of the characters are cheerful
and pleasant (even "The White Witch") and the many mathematical
puzzles which are sprinkled throughout are cute and
entertaining. Clear and concise answers are p