The 99% Invisible City

The 99% Invisible City: A Field Guide to the Hidden World of Everyday Design is a 2020 non-fiction hardcover book on urban design and architecture co-authored by Roman Mars and Kurt Kohlstedt. Published by Houghton Mifflin Harcourt, the book details the origins, engineering, and design of common urban elements, including utility infrastructure, signage, and buildings. Upon release, it became a commercial success, debuting on The New York Times Best Seller list.

While the book shares its title and thematic focus with the design podcast 99% Invisible, it functions as a standalone reference text rather than a narrative adaptation of the show's episodes.