How can you tell when a new edition of a textbook is coming out soon?

I know that bookstores have a way of checking with the publisher to see when a new edition of a textbook is due to come out in the near future.



How many months in advance can this be determined?



Are there any resources I can use to figure this stuff out myself so I don't have to call the bookstores and ask?



Thanks.How can you tell when a new edition of a textbook is coming out soon?
Usually you can check the new edition information in Amazon.com by searching the same book title.

In the search result list, search by Publication Date.

If the book name is not too common and if it has a new edition, it will come up in the first few result. You can click in and check further information to see it's the book you find.

The information sometimes appear 3 months before, sometimes a month before the new edition on sale.



Another method to guess if a new edition will come out is to check out the buyback stores. e.g. booksintocash, bookbyte, booksvalue.How can you tell when a new edition of a textbook is coming out soon?
You can pretty much assume that there's ALWAYS a new edition in the works. Textbooks are probably the most outrageously overpriced item in a student's budget, besides tuition itself. New editions are there to screw the students who have the old edition out of making back some of the small fortune they had to shell out for a new copy. They're also a good way of ensuring that royalties keep flowing into professors' pockets - if students are buying and selling used books, how would the professors who demand the latest editions make any money?