If you are a person that can read a few books, head to the local book store and do some reading. There are many books to choose from, so take your time when reading them. Plan on spending an hour or two reading a lot of different books. This will give you some extra examples on how to do your finance book.
Also research on the internet. There are a lot of different websites that you can research and learn a lot about your finance book. Like mentioned above, take your time before buying a book. You dont want to spend a lot of money on a book that wont give you the proper information.
When you have a large business, you may be able to hire a financial advisor or even hire an accountant that can help you with your finance books. Make sure you check references and know they can be trustworthy. This advisor will also take a look at your business credit history to make sure you are holding down a strong score and report.
When you apply for future financing, lenders will look at your finance books and your business credit to see what type of borrower you will be. If your business credit has late payments, liens, or records of bankruptcy you will have a difficult time finding financing for your business.