An ebook is meant to be shared. If there is nobody reading your work, it is as if cooking a dish and nobody wants to eat it.
In writing ebooks, you must promote it and let everybody know about it. If you will just keep it for yourself, you may not be able to advertise through it.
There are a lot of ways to promote an ebook. First is that you may submit it to eBook directories. You can find list of ebooks on this website. And if you want people to see your work, make your ebook available on these directories.
You can also send a mass email informing everybody about your ebook. Spread your links to social media networking and other internet portals.