Hi,
I am in the process of also writing a book.
There are lots of good books out there about getting published. It's just sorting through all of them and finding what you need. I find that looking in the index for exactly what I want is helpful. I keep looking until I find a good book.
Unfortunately, there is no one book with all the information that you probably need.
A good place to look for some good books on writing a book and getting published is the library. Especially, if you don't want to buy books right now.
Then you can find the one's that are the most helpful and maybe then buy those.
Also a good place to ask questions is going to
www.writersdigest.com.
They have all sorts of good information. You can also send e-mails for advice and questions.
GOOD LUCK!!