Content and Language Integrated Learning (CLIL) is an educational approach for learning content through an additional language (foreign or second), thus teaching both the subject and the language. CLIL is a new didactic approach to teaching subjects integrating two features – linguistic and factual. This paper aims at first presenting some views relating to content and language integrated learning (CLIL), differentiation among teaching general English (GE), teaching English for specific purposes (ESP), and CLIL. Then, it applies the CLIL perspectives to analyze some specific features of an English textbook developed for students majored in International Studies of Faculty of International Studies at University of Foreign Language Studies – The University of Da Nang (FIS). Finally, some suggestions to ensure the effectiveness of teaching and learning this textbook at FIS are also provided.