1000 Basic English Words is a four-book series, designed to introduce 1000 essential English words to EFL learners and to reinforce the students’ learning through the systematic recycling and review of each of these words.

2000 Core English Words is a four-word vocabulary textbook that allows you to memorize words effectively by grouping them into themes and learn vocabulary naturally through natural dialogues and comics.

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 beginning to advance 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.