The Production of Houses
(A special holiday-edition of the book photo from sunny Italy). This is one in a long list of book written by Alexander and collaborators about building and architecture. This book is essentially a case study in his building process adopted by a community in Mexico. Ultimately I think it's fair to say the project failed; in part due to the government. The thing I liked about this book is it showed "real-world" issues with the adoption of his process; insofar as not everyone engaged in the patterns and building process as he expected.
One interesting thing it has is a discussion of how to achieve his particular kind of building in a decentralised way; and it's quite practical and interesting. I think it's fun to see this kind of discussion, which is topical now, in a work that is quite old. That said, this book is probably not for you unless you happen to be particularly obsessed with Christopher Alexander and community-focused building.