A "First Edition" refers to the very first printing of a book. This edition is significant because it captures the author's original work before any changes or corrections are made. Collectors often seek out first editions because they can be rare and valuable, especially if the book becomes popular or if the author gains fame, like J.K. Rowling with her Harry Potter series. First editions can vary in quality and condition, which affects their value. A first edition in pristine condition, often referred to as "mint," is more desirable than one that shows wear and tear. Collectors may also look for first editions that are signed by the author, adding to their uniqueness and worth.