This edited volume is a welcome contribution to the body of scholarship on online learning -- and in particular to language learning, which is heavily represented across the chapters. Meskill has brought together a collection of studies that highlight the role that agency, environment and social practices play in the learning process. Covering technologies ranging from Second Life to wikis, and discursive elements ranging from introductions to humor, these studies are engaging and highlight the diverse ways in which discussion-based learning may occur. -- Vanessa Paz Dennen, Associate Professor of Instructional Systems, Florida State University, USA What is so appealing about this new volume edited by Carla Meskill is its willingness to engage with the complexities of learning and teaching online. Thus, broad generalizations about effectiveness and value are replaced by rigorous research studies that chart the participant experience over time and in detail, within a sociocultural view of learning. The result is a collection full of wisdom and insight reflecting the knowledge and experience of the contributors. The four parts of the book facilitate a breadth and depth of treatment that is especially effective in providing more complete descriptions of the learner experience and practical suggestions for the reflective online teacher. -- Mike Levy, Professor of Second Language Studies, The University of Queensland, Australia