A Tour of the World's Shapes - The Math Explorers Series, Book 10 (Pre-order, ships 07/01/26)

A Story of Counting, Balance, and Getting It Right — and a Little Night Music

The Math Explorers Series — Book 10

Now the world is waiting.

As the Math Explorers prepare for a journey beyond the familiar paths of the Stream and the Still Pond, they discover that mathematics travels with them. Distances must be measured. Routes must be planned. Time zones must be understood. Schedules must work across places where the clocks do not agree.

What begins as an adventure quickly becomes a wider test of everything they have learned.

Along the way, Elm, Aspen, Tamias, Melvyn, and their companions encounter new places, new problems, and new ways to see the world. The numbers are no longer confined to a bridge, a dam, a restaurant, or an inn. They connect entire systems. They explain how far away something is, how long a journey will take, and how many small decisions must fit together before a plan can succeed.

And as the Explorers look ahead to Elm and Aspen’s wedding, the final chapter of their journey becomes more than a lesson in mathematics. It becomes a celebration of friendship, growth, and the quiet satisfaction of getting the important things right.

The concluding volume of The Math Explorers Series brings together the ideas developed across all ten books in a story about travel, planning, perspective, and the mathematics hidden inside an interconnected world.

The book also includes educational appendices with teaching moments, a glossary of key terms, and activities designed to help young readers explore the mathematical ideas in the story.