A Grief Observed (1961) by C.S. Lewis (link)

A short but intense read. A series of notes written after the author's wife had passed. I particularly enjoyed—if one should enjoy reading such a volume—the thoughts on the existence of God, the dead, and the impact they can have on someone's day-to-day life. Not a read I would normally pick up, I can imagine that this would be useful to individuals in certain circumstances where they are grappling some of life's greatest challenges.