Breakthroughs uses theme-based units to teach advanced ESL learners the keys to expressing critical thought in the English language. It is a four-skill book whose comprehensive, easy-to-navigate Table of Contents gives instructors a clear picture of the lessons and pedagogical features. The body of the text includes ten units. Each unit incorporates advanced vocabulary, reading, grammar, writing, and listening exercises. Units begin with discussion questions that prompt class interaction and the exchange of analytical thought about that unit's topic. Vocabulary lessons use wordassociation and dictionary exercises to further improve advanced learners' diction while advanced, thoughtful reading exercises allow students to practise and further understand the new diction. Grammar features appear twice throughout units and teach essential skills for advanced learners whilewriting exercises help to cement new concepts. Finally, new and improved listening exercises encourage advanced learners to hone their understanding of native speakers' fast-paced speaking styles.