* No Universal Number: There isn't a single "publisher number" that exists on every first edition.
* Variations: First editions of Harry Potter and the Sorcerer's Stone came in different print runs, and each run might have its own unique identifying features.
* Importance of Details: To determine if you have a first edition and its value, you need to look at multiple details like:
* Printing: Look for "1st Impression" or "1st Edition" on the copyright page.
* ISBN: Check the ISBN. For early US editions, it should be 0-590-35342-6.
* Dust Jacket: The dust jacket is crucial for identifying a first edition. There are specific variations in early printings.
To get a definitive answer:
1. Find a Reliable Source: Use a reputable book dealer, auction site, or a resource dedicated to Harry Potter book collecting to compare your copy to known first edition characteristics.
2. Professional Appraisal: For the most accurate information, consider having your book professionally appraised by a rare book expert.
Remember, the value of a first edition Harry Potter book is determined by its condition and rarity. Good luck with your search!