This comprehensive reference work seeks to provide a definitive, organized overview of the life, works, and theological thought of C.S. Lewis. Walter Hooper, who served as Lewis's private secretary and later as the executor of his literary estate, utilizes his unique access to personal archives and correspondence to construct a systematic guide. The text functions as both a biographical record and a critical analysis, mapping the development of Lewis's intellectual and spiritual trajectory across his extensive bibliography.

The work is widely regarded as an essential, authoritative resource for scholars and enthusiasts, given Hooper's unparalleled proximity to the subject. Its dense, encyclopedic structure provides a foundational framework for understanding the breadth of Lewis's literary output and personal history.