The book investigates the historical development and cultural significance of the bathroom. Barbara Penner, an architectural historian, examines how the bathroom evolved from its origins to become a global symbol of modern values like cleanliness, order, and progress. The book traces the international export of modern bathroom technologies and customs through colonialism, media, fashion, and tourism. It also explores the conflicts arising from this global spread and discusses more sustainable, low-tech alternatives relevant to contemporary environmental concerns.

The book is regarded as a comprehensive and insightful exploration of a seemingly mundane yet culturally significant space. Its detailed historical tracing and global perspective offer a unique lens through which to understand modern values and their dissemination. The inclusion of user-friendly and sustainable alternatives also positions it as relevant to contemporary discussions on environmental consciousness. The abundant illustrations are noted as enhancing the reader's understanding and engagement with the subject matter.