What has the author Philip Keller written?

Philip Keller is known for writing the book "A Shepherd Looks at Psalm 23." This book is a devotional that explores the meaning of Psalm 23 through the lens of a shepherd's life and experience.

It's a very popular and well-loved book, especially among Christians, and has been translated into many languages. While this is his most well-known work, he may have written other books or articles, but "A Shepherd Looks at Psalm 23" is the one that stands out in his bibliography.