Napa, Calif. — Beloved bookseller Copperfield’s Books is returning to downtown Napa — directly across the street from where it first opened 30 years ago. Scheduled to open this summer, the new 3,665-square-foot space will be part of the First Street Napa development. “Being so community oriented, we’re delighted to be back in the vibrant downtown environment we once occupied,” says Paul Jaffe, president, Copperfield’s Books. “With the renewal of the city center, we are ready to move back to the street where we opened the very first Napa Copperfield’s …