During my teenage years, I enjoyed reading Edgar Pangborn's sci-fi novel Davy. It was about the surviving generations in the post-apocalyptic Atlantic coast of North America. Their life was like in the medieval times. They referred to pre-apocalyptic times as "Old Time." The novel was a hardcover from the central library in downtown Vancouver, BC. It had a rustic illustration in front of it.
Source: tatoeba (10515769)