Whom do you tip? When do you tip? How much is enough? These are the questions that plague American travelers at home and abroad. This guide provides a welcome overview of tipping practices in many tourist settings: hotels, cruise ships, casinos, beauty shops, and restaurants. This slim, pocket-sized volume begins with an overview of tipping theory (the ``power tip'' vs. the ``thank you'' tip), and continues into the complexities of Christmas tips at home and when to leave no tip at all. The bulk of the book describes tipping philosophies in major countries (Australians do not tip; Brazilians expect tips), and gives tipping advice for all major tourist activities. Try this book for a hassle-free and socially correct trip. For all general travel collections. Olga B. Wise, Tandem Computers, Austin, Tex.