The editor and authors in this volume make a convincing case for focusing on advanced foreign language instruction. Importantly, they invite consideration of this focus as an opportunity to re-examine conventional definitions of the target of instruction. In so doing, readers also learn more about the theories highlighted in this volume, and their capacity to enhance our understanding of advancedness and its development within an educational context. This book thus mediates between linguistic and language learning theories and educational practice, modelling the very best of what applied linguistics has to offer.