I agree with you, JohnB - ebooks should be useful and should serve its purpose too!
ebook writing and selling is a fast growing industry with a very big buying audience too... Since we are living in the age of information where if people want something, they want it immediately, without delay. eBooks have grown quite popular since they are easily transmitted, easily stored, and require few resources to produce.
If you're planning to write and sell ebooks, I think this article will be quite helpful:
http://ebaysellingcoach.blogspot.com/20 ... iness.htmlCheers!