A salve for existential Angst
As a person reaches the age ed of seniority, their thoughts turn more and more to ask why am I here. For believers the question is what does God expect of me? For skeptics, though that question remains, just phrased differently, what is expected of me. We want to leave a legacy, to be remembered for having achieved something that contributed to making the word a better place. This is part of the human experience. I think this makes for a very interesting read; the author makes a succinct summation in his final chapter.
I will recommend it specifically to Douglas Gresham, the stepson of C S. Lewis, who, with his wife Merrie, is on a pilgrimage of similar ilk. I'd also recommend it people like myself who eschew pop culture books on how to achieve happiness.