Barnabas Calder is a historian of architecture specialising in the relationship between architecture and energy throughout human history. He also works on British architecture since 1945. He is currently completing a book with Pelican on energy and architecture worldwide over the past fifteen millennia. His book Raw Concrete: The Beauty of Brutalism, was published by William Heinemann in 2016. He is working on a complete works of Denys Lasdun, funded by the Graham Foundation and in collaboration with the RIBA British Architectural Library Special Collections.