Hello! My friend is just starting a professional photography business. I am looking for a general "how to start your own photography business" book to give him for his birthday. I've looked on Amazon and there seems to be many options. I would like a book that covers all the business basics, and also covers the different types of photography people can do professionally - stock, studio, magazines, greeting cards, etc. A good general intro, in other words! This is not my field at all. Any recommendations? Thanks!!!!