The current volume amply demonstrates that CALL has developed massively in terms of the expertise it can draw upon. The authors in this book are highly regarded as experts and most if not all have spent long years researching their chosen topics. If we were to compare this work with one of even a decade ago, the differences would be resounding... This contextual understanding and attention to detail is evident chapter by chapter, topic by topics in this volume. Cumulatively, the text represents a huge resource for anyone involved in the research and practice of CALL, both old hands and newcomers alike... This now leads me to what has impressed me so much about this book on topics present and accounted for, the discussion is state-of-the-art and written by top experts in the field. It will not surprise you, therefore, that I wholeheartedly recommend it to you. -- Professor Mike Levy, The University of Queensland, Australia (From the Foreword)