Salaam.
Like someone has already mentioned, you better off going through with it via a publisher. Now if the books not something of 'great quality', that's going to be hard. But I should think there should be small time publishers too.
I think there's a non-profit publisher around too. If you want, you could give this book for free in the path of Allah and knowledge - that's if it's to do with Islam.
You need to get a website made for the book, have certain well known people read it and give it their opinion. Try the local press and Islamic magazines out there.
You could also start a blog about it. It's free, easy, and a great way to give tid-bits of your book to people.
