The original builders BOOKSOURCE opened in 1982 and caters to the wonderfully over-educated contractors and design folks of the SF East Bay Area. It is located two stores north of Hearst Street on Berkeley's fashionable Fourth Street. Easy to reach from Interstate 80: exit at University Avenue, first possible left onto Sixth Street, next left onto Hearst Street, two blocks back toward the Interstate, right onto Fourth Street. Free parking across from store.