Ebook writing is very good and it's one of the best way to make money. Platforms like amazon kindle publisher have make publishing book very easy. All you have to do is write the book, edit it, design the cover and upload to amazon.Alot of ebook are there you can definately be making alot of money but for someone like me I think for you to be able to earn through ebook writing I beleive that you will need to have a good page that you will be doing the selling and also you will need an audience which you will be advertising that ebook to.