Confused about edition

[Abigail]

I have a copy of Atlas Shrugged. If I scan the cover of the book, the edition above pops up. And that looks like the right edition -- same cover, 35th anniversary edition, publication date.

Except the ISBN number. My copy has ISBN number 0-451-19114-5. If I search with that number, a different edition of Atlas Shrugged pops up, with a different cover, a different publication date, and claiming to be the 50th anniversary date (although the publication date is a mere 39 years after first publication).

Can someone explain to me what is going on?

[rivka, Librarian Moderator]

Unfortunately, some publishers re-use ISBNs even when they change the cover. This is especially common with popular books, published and republished for many years.