It is impossible to run a profitable business or build a successful career if you don't know how to deal with difficult people.  You'll encounter them as partners, customers, co-workers, and employees.  Failure to correctly identify them early, and resolve the issues they present correctly, can derail your career or business completely, or even land you in legal hot water.  This guide helps you approach problematic people in a way that protects you and your work going forward.