To develop vocabulary, students need to get a lot of exposure to language input, one of which can be done through reading English texts. Expand Your Vocabulary: A Contextual Vocabulary Study Book is designed to help students expand their English vocabulary through authentic reading materials and contextual vocabulary exercises. The units offer different topics of discussion and vocabulary-related concepts that are worth learning. With better vocabulary mastery, it is hoped that students become more active and confident in performing their English skills: reading, writing, listening, and speaking.---