Hi I am currently using indesign in cs4 and now I want to publish a book in epub as a fixed page publication. I understand that indesign CC will do that. I am a bit confused with what to buy. I don't need a cloud account because I publish on my own and do not share with other designers or staff. So my question is what do I buy to get the facility in indesign to do a fixed page Epub.
I've moved your question to the InDesign EPUB forum.
You need the latest version of InDesign - CC2014.1 - and this is only available on subscription.
InDesign CC2014.1 is your only choice. Your CS4 license will get you an intro rate for the first year of Creative Cloud of $29.99/month. After the first year that moves to $49.99/month. A single application subscription for InDesign only will be $19.99/month.