"So much has already been written about Lewis, so many aspects of his life and work so thoroughly explored, that one might think that would necessarily be a slim volume! Nothing could be further from the truth. These fascinating essays not only include many new discoveries and fresh insights into his life and work, but also map out a trajectory for future studies. In doing so they honor the insights of Chris Mitchell to whose memory they are dedicated, and who had himself, in a celebrated lecture, suggested the structure and topography followed in this volume. In that sense, though it is admirably edited by Bruce Johnson, it is in many respects Mitchell's book. And there is more. As Diana Glyer points out in her excellent essay on "The Algebra of Friendship," friends bring out and augment what is latent in one another. These eighteen essays by friends of Chris Mitchell are themselves a testament to how much his friendship and influence augmented their insights into Lewis. Now happily, the fruits of that fine combination of scholarship and friendship are available to augment our understanding too."