07 Feb 10 7:02 am
You could do a single domain for all three sites and use sub-domains for each product. You would register a generic domain name such as ebookreviews.com then create sub-domains for each niche:
You can set up a WP blog on each of the sub-domains, and Google will treat each sub-domain as its own domain.
Your 2nd option, which I use, is to get a hosting account which supports multiple domains. HostGator has a good one that costs about $30 bucks a month. In this model, each site has its own domain.
Your 3rd, and least desirable option, is to host a single domain and blog post/write reviews for all your products on the one website. In doing that though, you kind of kill your "I'm an expert in my niche" mystique...after all, can you REALLY be an expert in golf, health AND acne? I suppose if you're an in shape golfer with acne problems you could, but start adding other niches to the mix and you may have some problems.
An example of one such site that actually does a pretty good job of this is http://www.ebooksinreview.com/
Personally, I prefer the one site per domain model.