This book is written for fourth- to sixth-grade students to provide enrichment in mathematics and also can be useful for teachers to supplement the math curriculum in those grades. Math topics are presented by engaging the reader in a fantasy story. Building on the mathematics already learned in elementary school, the story enhances the student's understanding of general mathematical ideas of equality, congruence, symmetry, and uniqueness and also introduces mathematical reasoning. It is a story within a story that will surprise the reader, showing outcomes that are contrary to the reader's...