Textbooks can be issued in a new edition because of better information.
Sometimes, however, they’re issued in new editions every few years because it’s the only way to keep the book selling in the face of competition from the used book market.
For textbooks, this number is far, far lower.
Do different editions of books matter?
Usually, each version of a book has a few changes, but over a number of editions, those changes accumulate and significantly alter the textbook. Most professors are fine with the students using the previous version of the book or even an earlier version than that.
Do different editions have different ISBN?
ISBN stands for International Standard Book Number and it is a unique identifying number for a book. It refers to a specific edition. For example, paperback and hardcover versions of the same title will have different ISBNs. A textbook will have a separate ISBN for each edition.
Why does the same book have different ISBN numbers?
An ISBN (International Standard Book Number) is intended to identify a unique edition of a book. Thus a hardcover edition of a book will carry a different ISBN than a paperback edition of the same book, and a revised edition of a book gets a new ISBN even if it carries the same title. That would warrant a new ISBN.
What is a second edition of a book?
Launching a second edition is like having a wedding with 25 people instead of 250; you go through nearly all the same steps as the big wedding, and you’re still tired when the day is done. Publishing and launching a new edition requires all the work of a new book: proofreading, copyediting, layout, etc.