With over 400 million downloads, 99% Invisible, from the US-based Radiotopia collective, is one of the most popular and influential podcasts in the history of the medium. In this exclusive Canadian debut, host Roman Mars joins Nahlah Ayed, host of CBC's Ideas, to discuss the show's exquisitely crafted stories about the unnoticed architecture and design that shape our world and its riveting new, bestselling book, The 99% Invisible City. Enter the creative mind of one of the world's great podcast artists and explore the places, people and ideas behind his "stories for beautiful nerds". Purchase your copy of The 99% Invisible City here.

In conversation with Nahlah Ayed, host of CBC Radio program Ideas.

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