DelliCarpini and Alonso's book "Content-Based Instruction" explores different approaches to teaching content-based instruction (CBI) in the English language classroom. They provide a comprehensive overview of how to teach CBI in an easy-to-follow guide that language teachers will find very practical for their own contexts. Topics covered include academic language development challenges and approaches, interdisciplinary teacher collaboration, and a two-way approach to CBI where content teachers and English language teachers work together and collaboratively develop complementary content-driven and language-driven CBI objectives. "Content-Based Instruction" is a valuable addition to the literature for the English language teachers' profession. Following a preface, the contents include: (1) Introduction; (2) Keeping Up With the Times; (3) Developing Academic Language; (4) Interdisciplinary Teacher Collaboration; (5) A Two-Way Approach; and (6) Conclusion. References are also included.