Aimed at teen-agers on their own or hoping to be, a compendium of useful instructions, advice, and sources of help and further information. Beginning with schedules and how to choose compatible companions, Bernstein goes on to modes of transport from air to hitching (she gives all the reasons for not hitching, but also tells how to ""increase your chances of survival"" if you insist). Other units include places to stay; resorts, package vacations, and tours; customs, passports, money exchange, etc.; and packing. ""On the Trip"" covers such topics as health, safety, tipping, strangers, running out of money, and getting lost. Bernstein strikes a good balance between telling what teens want to know and leveling with them about dangers and acceptable behavior; her concise, nonjudgmental style will draw them. Parents should be pleased with the sensible advice and thorough approach.