you better get a job working every possible position AT A BAR (waitress, bartender, bar back, manager) first before trying to own and run one on your own - that s the only way you will learn what you need to learnlook in teh business book section at any large bookstore
I have not come across a book, but many people have blogs that discuss these issuesget a job in a bar and see first hand for your self the good and bad about this type of businessworking for someone you quickly see where the gaps are so when you do have your own place yu know what needs to be properly managed