If you have a great idea for a book, there’s no one right way to go about trying to get it published. You can hire an agent to help you through it all and make sure you find a good publisher and get a good deal, but they’d take a cut of your fee (typically 10%), so you may choose to go it alone.
I’ve never actually approached a publisher – they came to me – but if you’re not that fortunate, the best way to try to get your book published is to submit a proposal to a publisher. To do that: