Fortune asked 18 business leaders to write about their favorite titles. Glenn Hubbard reviews   The Fellowship: The Literary Lives of the Inklings, by Philip Zaleski and Carol Zaleski:

"I have always admired and enjoyed the writings and speeches of C. S. Lewis, the brilliant Christian apologist. Lewis’s ideas, like his carefully constructed sentences seem so fully formed from within. But my interest in Lewis got deeper and broader as I read The Fellowship: The Literary Lives of the Inklings. The intertwining of Lewis’s work with his relationships with mythmaker J. R. R. Tolkien and literary lions Owen Barfield and Charles Williams cast Lewis in a new and fascinating light. The story reminds us all that the fount of ideas in a great university is as much about conversations as it is about one’s original thoughts."