Want an architecture tour of Denver? You could do worse than tour the city’s branch libraries. “Virtually from the beginning of Denver’s library system, its leaders have believed that form was as important as function, more or less consistently investing in high-quality architecture.” It’s “a surprisingly comprehensive lesson in 20th and 21st century architecture from arts and crafts and other historic styles through modernism and post-modernism.” Radical or not, all the libraries have been accepted by patrons, and most have become local landmarks.