Can It Do Well On Clickbank and Its Likes

What kind of book is it? What niche?

Clickbank has always done well selling eproducts. My suggestion is you put it up and recruit affiliates to promote. It can certainly do well

When you create your own product on ClickBank, you need to know how to create marketing to sell it yourself. If you can do this, and have your own website, you can offer customers a lot more customized, tailored information and value, make a lot more sales, and reach a lot more peopel with a message you completely control.

Also, if you want to expand, and build audio and video courses, which can triple your income, and offer many times the value, you don't have a "house" to sell all your products and educate customers on them in an organized, structured, way.

Amazon and CreateSpace host your product, and give you a place to sell it, but like anything to be successful, they require less work and knowledge to be successful, but give you less success in return.

It will do well on ClickBank if you know how to create strong marketing for it, how to reach your market (find others in similar, but noncompetitive niche products who will promote it for you), and you offer it as instant download.

Whether it will do well isn't about your product - obviously it does well - it will be based around how well you execute the marketing and promotion in your transition to your own space (your personal website).