Instructions
Open the book to the copyright page. This is usually one of the first pages in the book. If it is a first edition, it will say "First Edition," "First Printing," "First Published," "Published," or "First Impression."
Turn to the title page, which is one of the first pages of the book. It is a page that has the title of the book in big letters. If it is a first edition book, the date on the title page should be the same as the copyright date, which is listed on the copyright page.
Look for a number line on the title page or copyright page. A number line is a series of numbers separated by spaces. They were used in the post-World War II era, and indicate a first edition, especially if the number "1" appears in the number line.