Mark Dowie doesn’t let up, though his latest book is a treatise on letting go. Every several years, he offers readers a new book on some heady subject. And now comes “Judith Letting Go, Six Months in the World’s Smallest Death Café,” something very different from his usual fare, though still heady, and profoundly heartfelt.
When I first read the term “death café,” I thought it was something Mark had made up. But no,…