Liliane Wong's new book on Building in Existing Contexts presents 50 spectacular conversion and repurposing projects worldwide, including buildings such as the TWA Hotel at New York's John F. Kennedy Airport, the CaixaForum in Madrid and the Neues Museum in Berlin. The projects are organized and described using a new classification system aimed at both practitioners and academics. The author's introductory essay provides a comprehensive overview and historical contextualization of the enormous development and expansion of adaptive reuse in architecture over the last 50 years.