In Books Unlimited's old home on University Boulevard and Evans Avenue, the cozy quarters and musty smell of yellowed pages made you want to curl up with one of the store's good books. Unfortunately, there was no space to curl up in. In its new home on Colorado Boulevard, Books Unlimited has retained its charm and gained ample browsing room -- and a parking lot. It also sports some once-forgotten treasures: While relocating 80,000 books last fall was a monumental task, the store's owners discovered many buried treasures when they finally unpacked. Limited-edition reference books, signed tomes by Isabel Allende, Oscar Hijuelos and Jay McInerney, as well as a nine-volume set of Abraham Lincoln's papers, have all been restored to their rightful spots on the shelves of the new and improved book nook.