There are different aspects of the e-book business and not all of them might be beneficial for you. The fact of the matter is that different people are targeting different audiences with a variety of subjects. Hence, the writer selling e-books on Environmental Design will have to target a specific or niche audience while a writer trying to sell e-books on Treating Acne will have a different audience. Audience is extremely important because if you are not selling to the right customers then your e-book business will definitely hit a dead end in the long run.
You will need to identify your audience well before you actually start writing your e-book. Audience or probable customers can be categorized into different groups of segments like old-age customers, youth, children, customers in Asia, Africa or Middle East, European customers, industry specific customers like electronics, design, etc; and much more. Once you know who you are selling to, it will be easier for you to write for them.
The second most important aspect is having an automated selling system. Yes! Even in the cyber age there are many writers who prefer to sell manually. This can be time consuming and painful. It is considered to be an unfriendly customer experience and this can even make your e-book business suffer. When there are several payment gateways or payment service provider (PSP) available why take the chance? You can easily open merchant accounts and enjoy fast and secured payment transaction using an automated selling system and it will be easier for your customer too!
The bottom line is that the growth of your e-book business depends on what subject you are writing on and how streamlined your selling and transaction process is.