Textbooks play a crucial role in language teaching particularly in EFL classrooms where they provide the primary form of linguistic input. EFL textbooks are expected to develop EFL students'' linguistic and pragmatic competences. Pragmatics, claimed by some to be the fifth skill in language learning, needs to be incorporated as an integral component of EFL textbooks. However, there is little knowledge on how well pragmatic aspects of language are taken into consideration in developing EFL textbooks in general and Iranian high school English books in particular. This book addressing this gap in the literature attempts to explore pragmatic knowledge incorporation into English books in Iranian public education system. EFL teachers and researchers whose professional and academic interest lie in English teaching in public schools will benefit from studying this book.