A Grief Observed by C.S. Lewis

I found this among my mother's books, and it caught my eye for some reason.  I am not a religious person, and I am not a Christian, while C.S. Lewis was both, so I'm not exactly sure why I chose to read it.  It was a memoir of the year or two after his wife died, when he was questioning much of what he had believed all his life, including his belief in God.  It was very short or I would not have finished it. I rated it 2 out of 5, but most who read it rate it much higher.  Certainly it was well written, and you could feel the anguish Lewis felt over the loss of his wife, but the religious aspect of the book was difficult for me to relate to.