The first good book I've read on the subject. Day presents his research into the consensus design process- one that fundamentally challenges the typical power-based structures employed by architects, developers, city-planners, and otherwise wealthy and powerful players with vested interests. His approach essentially inverts the typical decision process by agreeing first on an understanding of the site and program (something that's relatively easy to attain) and then moving eventually into more concrete issues. In this way, the designers/users/clients/consultants/financiers/etc can all refer back only one or two steps in the process to find a place where everyone was in agreement.
Day also puts forth a well-developed and interesting description of "spirit of place" (or genus loci for the architects out there). He posits this as a synthetic term describing the "building-up" of several ingredients including the physical facts of a place and the psychological and emotive effects of these physical conditions. He approaches design as something that should ultimately address a place's spirit. Through a process of group analysis he guides participants into agreeing on the fundamental character of a specific site as it currently exists. From there the group addresses what the spirit should be and (eventually) how this could be achieved. In this way, all specific proposals (the room should be THIS color) can be judged in regard to the already-agreed upon spirit-of-place intervention.
Following a brief history of socially inclusive design and experimentation, the book is divided into two sections- an explanation of Day's process and the theory behind it, and a series of case studies with a candid discussion of the successes and failures of the process in each case.
This is a great reference and potentially a powerful tool for all designers and potential clients who are concerned with the inherent power disparities of the traditional design process and their eventual societal effects.