Useful Websites September 5, 2016 21:35
Books Are Everything - Author/collector Graham Holroyd's site provides searchable database, pages on grading and reference books, more.
Grading the Condition of Vintage Paperbacks & Pulps - This eBay guide by benneson is a concise intro to the topic.
The Revolutionary Effect of the Paperback Book - Smithsonian.com - Clive Thompson's article provides some historical background.
Vintage Paperback Archive - Informative site includes list of paperback publishers, articles, cover artists, key authors, much more.