Does a ISBN number always lead you to the direct edition of a text that you need?

I am using half.com for the first time and was wondering because no edition is listed in the book I am looking for. But the ISBN num. is the same and the list price is the same as my current book store(of course half.com has a cheaper rate but can say edition 7%26amp;8 have the same ISBN number or are they different specified for that edition.|||Sometimes a company has teamed up with another


book company and the editions are not identical but


are very similair the ISBN number should show you


which edition was printed first or the year it was listed.|||as far as i know, i think there are different ISBN for every edition


at the same time different ISBN for every type of materials








hardbound vs softbound








and if its imported ISBN changes too








but im not sure about the rules here








so my answer is YES