4000 Essential English Words is a six-book series that is designed to focus on practical high-frequency words to enhance the vocabulary of learners from high beginner to advanced levels. The series presents a variety of words that cover a large percentage of the words that can be found in many spoken or written texts. Thus, after mastering these target words, learners will be able to fully understand vocabulary items when they encounter them in written and spoken form
مجموعه کتابهای Essential English Words برای آموزش واژگان و اصطلاحات کاربردی زبان انگلیسی توسط انتشارات Compass در سطوح آموزشی مختلف به چاپ رسیده است.