An icon of Silicon Valley's counterculture, Stewart Brand is confronting his final years in a home that embodies the self-sufficient, DIY ethos of his famous Whole Earth Catalog. The three-building cluster in Petaluma where Stewart Brand and Ryan Phelan live. The new studio is in the center. This past January, Stewart Brand published a book, "Maintenance is what keeps everything going," he begins. "It's what keeps life going." Brand's life has been going for 87 years, but lately the going has been tough. The man known for creating the Whole Earth Catalog --the 1960s countercultural guide to self-sufficiency that Steve Jobs was fond of --has an incurable disease and is down to 130 pounds, an alarming weight for a nearly 6-footer. Brand's mind is sharp as ever; you can't talk to the man for five minutes without learning something. But his once-nimble movements are now cautious, and he's never far from an oxygen tank. Stewart Brand's body, in other words, requires constant maintenance.