I recently read Rabbi Kushner's book on the 23rd Psalm. It is an insightful read.
Psalm 23 has been a comfort to most, and anyone who has turned to this Psalm in need will benefit from reading, and considering, this book.
This is a book I would recommend for anyone who has suffered a recent loss. But it is also a book we can all learn from and find even greater comfort from a pastoral Psalm.