There has been a remarkable revival of interest in how we conduct social actions in interaction - particularly in requesting, where recent research into video-recorded face-to-face interaction has taken our understanding in novel directions. This collection brings together some of the latest, cutting-edge research into requesting by leading international practitioners of Conversation Analysis. The studies trace a line of conceptual development from 'directive' to 'recruitment', and explore the acquisitional, cultural, situational and species-specific differentiation of forms for requesting in human social interaction.They represent the latest explorations into the complexities and controversies associated with the apparently simple but essential matter of how we ask another to do something for us.