Writing an EBooks.
First thing to do is choose a niche to write your eBook in, think about the problems people have and what do people want, then create value for them, find solution to their problems and then you can make money from your eBook. This can be done by creating an informative eBook on a specific niche subject.

Some reasons to write and publish an eBook.

1. Selling products means no more exchanging time for money.
2. Ability to create multiple strings of income.
3. EBooks have 100% profit margins your costs are all the same (time).
4. Instant gratification.
5. Access to national and global market.
6. Increase value to other people’s lives.
7. Leverage, you can get others to sell for you.
8. It cost nothing to setup, start cost practically nil (Word processor).
9. You can work anywhere.
10. Ability to automate you business.
11. No need to purchase a store or employ an assistant.
12. Ability to be known as an expert in your chosen niche.
13. Fast to produce and publish.
14. Little skill required and you don’t have to leave your job.

A few links to assist you along the path.
http://onlineincometeacher.com/money/how-to-make-money-by-writing-an-ebook/

https://www.youtube.com/watch?v=YjEMkAH5oGo&feature=related

https://www.youtube.com/watch?v=VVah8omq8GY&feature=related
http://www.wikihow.com/Make-Money-Selling-Your-Own-eBook