There are several different types of photo business:
For Commercial photography see: Best Business Practices for Photographers, by John Harrington (www.johnharrington.com) and Professional Business Practices in Photography by the American Society of Media Photographers, www.asmp.org.
If you are interested in retail photography go to Amazon.com and search for books on the business of running a photography (portraiture) studio and/or the business of doing wedding photography.
There are also books that cover the business of high school senior photography.
As far as books about starting a business of any kind, requirements vary by city, county, and state.