The Brutalist talks given by C20 are by far the most popular along with Art Deco. The use of concrete, a defining feature of Brutalist buidlings, has become almost fetishized. Various books already out on the subject, but as with Art Deco, there isn't actually an accessible overview of the best British Brutalist buildings. With C20 branding and Elain H's writing, this would actually be a very good addition.