Even though I doggedly believe in my books long before they are published, long before any editor has expressed even a remote interest, somehow I still doubt that my books will ever be physical objects in the world until I see their covers. The cover of Xylotheque: Essays features a photograph that I took at Sleepy Hollow Cemetery in Concord, Massachusetts, well after all of the essays had been written. In fact, the weekend before my final manuscript was due at the press, I took a copy of it, along with my camera and a copy of Henry David Thoreau’s Walden, to Concord and to Walden Pond where I finished the book. And so, even though none of the essays are about Concord or Walden—since I had never before been there—still, the book was influenced by that place. And so I think it is a fitting cover image.