During my recent reorganizing of my library, I discovered several trade paperback books that are identified on their flyleaves as "Reader's Copy," or "Advanced Copy." On all of them is the phrase: "Not for Resale." I cross-checked the public library's stacks and identified that they became commercially published hard-bound fiction books. What is the purpose for these trade paperback versions that were not for sale, but evidently distributed without cost to whomever were their recipients? Since first editions of most hard-bound fiction have print runs of 12,500 or 25,000, how many of the Reader's or Advanced copies would have been printed and distributed?