"In this book Will Vaus has carefully and thoroughly examined all of Jack's published thinking and followed his trains of thought through a lifetime of development, showing us how the theology that governed Jack's life grew and ripened through his letters, his books and his essays until we can understand not only what Jack believed but also why he believed it and how he arrived at that belief. For those of us trying to grow in our faith and thus come closer to the Lord Jesus, this is a valuable addition to our libraries."

"Mere Theologyis a powerful and convincing expression of Christian faith and practice, for it is iconic as the lucid and comprehensive outline of C. S. Lewis's apologetics, interpreted by the selflessness of the author. For Will Vaus only interposes his own critique on appropriate occasion, as few other commentators of Lewis have done before him. Historically it also exposes the growing gulf between the theological orthodoxy of Mere Christianity and the Christian cultural compromises made since the 1960s."

"Vaus organizes Lewis's brilliant welter of arguments, stories and evocative illustrations into an orderly account of his entire view of the way things are under God. It is a job very well done, with meticulous precision and minimal comment. Lewis-lovers will be most grateful."