Personally, the only thing I've been published in is a yearbook & newspapers (photographs, mainly). However, my friend Alyssa wrote a book and self-published it through
www.xlibris.com. Now her book is available through Barnes & Noble's website. You could look into that.
Here's a website talking about how to get published or get an agent.
http://www.rachellegardner.com/2011/02/how-to-get-published/I know it's a somewhat difficult process. If it's what you want to do, though, you've got to put everything into it. I hope this helped -- or if not, I hope someone else comes along and offers some good help.
Good luck!