Do extroverts and introverts learn language differently? How these personality traits can effect language learning process? The book aimed at answering these two main questions by analyzing potential affective variables. It provides an overview about the main differences in introverts and extroverts language learning, particularly, the language learning strategies that they employ. Language learning strategies, their classification, types and role that they play in language learning thoroughly discussed to get a clear picture. The book could be useful for language teachers as they could be informed about how to work with introverts and extroverts at the same class by conducting mutually effective lesson and helping learners to choose effective language strategies.