The Danish term "bofællesskab" (living community) was introduced to North America as "cohousing" by two American architects, Kathryn McCamant and Charles Durrett, who visited several cohousing communities and wrote a book about it. The book resonated with some existing and forming communities, such as Sharingwood in Washington state and N Street in California, who embraced the cohousing concept as a crystallization of what they were already about. Though most cohousing groups seek to develop multi-generational communities, some focus on creating senior communities. Charles Durrett later wrote a handbook on creating senior cohousing. The first community in the United States to be designed, constructed and occupied specifically for cohousing is Muir Commons in Davis, California. Architects, Kathryn McCamant and Charles Durrett were responsible for the programming and the design of the site plan, common house and private houses.