So, you have decided to start an ebook business. The question: what kind of ebook are you going to sell and how to bring it into the market?
The first thing you should know before bringing a product into the market is: SUPPLY + NO DEMAND = NO SALES. That is why you have to carefully research what people want, then find a suitable product that will meet that demand.
To do a research, visit http://inventory.overture.com/d/searchinventory/suggestion. Throw in these keywords: