Remember that scene in The Big Sleep where Humphrey Bogart goes to the used and rare bookstore and talks to Dorothy Malone? In that scene, he asks her if she has a Ben Hur, 1860, third edition, with a duplicated line on page 116. She goes and looks at a book to look it up. My question: what was that book? Is it a book listing all first editions? Or...? I ask because my character works in a rare and used bookstore. I want to be as authentic as I can in writing her world, but even though I LOVE books, I'm afraid I don't know much about this world. I found a great resource here https://pages.bookstellyouwhy.com/rare-books which is great for telling me how to do things NOW. But, how did they do them in the 1930s and 1940s? I figured if anyone on the planet would know, it was people here at the Fedora Lounge!