Along the same lines, I have enjoyed several times a little book called "Searching for and Maintaining Peace", by Father Jacques Philippe. It gives a Christian/Catholic perspective on how to deal with the troubles of life: fear of being without, fear of suffering, dealing with the suffering of loved ones, impatience with the shortcomings of others, kicking ourselves when we commit a fault, etc.

The short answer is to acquire and maintain an interior peace, no matter what the circumstances. This allows the grace of God to act through us. The book develops this idea from several angles, in about 100 pages.

Harry Potter has better story and better lessons.