This book investigates the global phenomenon of English Medium Instruction (EMI) to determine whether its rapid implementation aligns with pedagogical efficacy and long-term educational outcomes. Ernesto Macaro, a prominent scholar in applied linguistics, synthesizes a wide range of theoretical frameworks and policy documents to examine the shift toward English-language instruction in non-English speaking countries. He argues that while the momentum behind EMI is significant, the current implementation often lacks a rigorous cost-benefit analysis regarding the impact on both teachers and students.

Experts in applied linguistics and education policy recognize this work as a foundational text for understanding the complexities of EMI. Readers frequently note the academic density of the prose, which provides a comprehensive overview of the field for researchers and practitioners alike.