When I started my first business with my wife several years ago I had no idea where to start. I had an idea and the ambition to make it a reality but as for the business end of things I was lost. So I started looking for a book that could give me a general scope of things to to expect and how to handle them. That’s when I came across Small Time Operator: How to Start Your Own Business, Keep Your Books, Pay Your Taxes, and Stay Out of Trouble! while reading Steve Pavlina’s Blog (This guy’s blog is great btw, a little unorthodox on his thinking but his advice is pretty damned sound)
So I think at the time I bought the book it cost me like 9 bucks. It was probably one of the single most important purchases I made in me first year of being in business. The money it saved me by making me aware of common mistakes and bad practices is probably what kept my first business from failing (It was a PC Repair shop).
If you spend any money at all on research for a game center, or for a business in general I would highly suggest Small Time Operator: How to Start Your Own Business, Keep Your Books, Pay Your Taxes, and Stay Out of Trouble!