In the Mathematical Kingdom, numbers are magic, and one brave child holds the key to setting it free.
When Milo discovers that Princess Luna is trapped in the Crystal Tower, guarded by seven mysterious locks, there's only one way to save her: learn the magic of mathematics.
Over thirty enchanted nights, Milo journeys through a world of talking animals, wise wizards, singing sprites, and gardens that grow in perfect patterns - mastering counting, addition, subtraction, multiplication, and division along the way. Each new skill earns a magical key. Each key opens another lock. And with every page, Princess Luna's freedom draws closer.
The Mathematical Kingdom turns bedtime into an adventure, gently building real math confidence through story, wonder, and a hero worth rooting for - one chapter, and one night, at a time.
Perfect for young learners ages 4 - 7, and for grown-ups who want math time to feel like magic time.

Karl Heinz Wagner was born in the United States to a family with both American and German roots. He grew up and was educated in Mexico City and Germany and later spent time in Great Britain and the USA. Today, he lives in a small German village with his wife and their two dogs.
Throughout his life, Karl Heinz has taken a keen interest in the way children learn. He believes that the basic skills of mathematics are best introduced in everyday language, through situations children can easily understand and, above all, enjoy. He has long felt that too much of the creativity and sense of discovery can be lost when fundamental subjects are taught, leaving some children struggling to remain interested in learning.
The Mathemagical Kingdom grew from his wish to approach those early mathematical ideas differently.