<p> <b>Paul Cattermole</b> is the former creative director of a specialist architectural picture library and an architectural writer based in London. His most recent work is <i>Buildings for Tomorrow: Architecture That Changed Our World</i>. </p><p> <b>Gwyn Headley</b> is the founder of the Folly Fellowship, a society dedicated to extreme buildings of architectural interest, and the author of <i>Architectural Follies in America</i>. </p>