There are many books on the craft of writing. Some published writers have used them and some have not. Though you do not have to read books on how to write well, or even on how to get published, it’s still a good idea to do so.
Many books will give you fabulous ideas on how to plot a story, write dialog, and pace while some general fiction books will even teach you how to write action or scenery. (That’s why writers consistently say to read, read, read.)
If you’re looking into getting published and have finished and polished your novel, you might what to check out the “Writer’s Market.” It lists information on not only how to get published, but of countless agents and editors as well. Usually, it is about $50 dollars or more, but you can find it at the library for free!