May be a good idea to do that if you think that your information will need frequent updates. Depends on the ebook content.
I like version numbers and use them on some ebooks, but not others. To me, a version number gives it a "software" feel and I always like to see "software" updates, because I know that the next version is better than the one I currently have.
Thanks for the reply. The book I'm thinking of using a version number on is about searching the web without the search engines - using software such as Alexa and WebFerret, and specialist web sites. It will need fairly frequent updates as the software changes, and as web sites come and go. I also keep thinking (or finding on the web) things that I'd like to include or change, so perhaps a version number will be appropriate for that.
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