This insightful and timely middle-grade nonfiction guide explores how geographical and political boundaries shape our world. The book expertly traces the evolution of these lines from natural dividers like mountains and rivers to complex modern boundaries like airspace, checkpoint zones, and sea territories. The warm, softly textured hand-drawn illustrations enrich this journey by bringing intricate global concepts to life with delicate linework and layered color washes. The book includes a glossary, index, and a resource page to help young readers expand their vocabulary and research skills.