From Getting to Know Death, which will be published this month by Bloomsbury.

I have been close to people who one day found themselves in the desperate place and didn’t make it out.

I remember struggling to write a letter to a young man whose father had just hanged himself. The father had been the builder of our house. He was charming and talented and proud of his son. I wrote these things to the son and then came the point in the letter where I was supposed to write something hopeful for the future. All I could think…