As a professor of Spanish I was hoping to find a good phrasebook on Costa Rican Spanish for a group of students that will be studying in San Jose next summer. I have always used Lonely Planet's guides when travelling abroad. However, I was very disappointed with this phrasebook. Beginning with the explanation of pronunciation, which is basically a guide to pronouncing Spanish with a strong American accent, the book is full of elementary mistakes regarding grammar, vocabulary and phonetics. For example, the "o" in Spanish is never pronounced as the "o" in "hot". There are similar mistakes throughout the pronunciation section. Perhaps one of the most important facts about Costa Rican Spanish is the complete absence of the subject pronoun "tu" (you) and its accompanying verb conjugations, as is the case in most of Central America, Argentina and many regions throughout Latin America. All Costa Ricans either use the more formal "usted" or the less formal "vos". You will never hear "tu tienes" (you have) in Costa Rica but rather "vos tenes". But this phrasebook claims that the "vos" forms are less common than "tu", when in fact the later doesn't even exist there. There are many more mistakes in the explanation of grammar, the subjunctive, "ser" and "estar", and others. The rest of the book is a series of phrases with the English translation. You would assume that Lonely Planet would have the resources to provide better material for travelers.