@Blinding_beauty
You ask people. You can ask friends and family, or post thing on yahoo or a blog if you have one, ask people for their opinions and take both the good and the bad. Then you can make improvements and soon people will just start reading. I can't guarentee that you will be the next J.K. Rowling, but people may start reading your book.
I hope that people do read your book, I'm going to and I hope you like my works to, HAPPY NEW YEAR!