When the much-loved but cramped Book Gallery moved across the street to its new location last year, it was as if a handsome prince had been released from a familiar frog. And handsome is the perfect word to describe Book Gallery's new space, which looks like a classic library, without the stuffiness. The staffers are laid-back and friendly, and knowledgeable about virtually every volume on their shelves. Chairs and tables are arranged throughout, for the comfy perusal of merchandise ranging from beautifully preserved first editions and ancient signed hardcovers to more modern, but carefully chosen, coffee-table books. Rows of rich wood shelves with glass doors house the rarest and priciest volumes. Luckily, the store stays open late (10 a.m. to 7 p.m. Mondays through Saturdays, noon to 5 p.m. Sundays), but with virtually every item here a gem, there aren't enough hours in a lifetime to fully explore the treasures of this literary museum.