At first I thought it was a meta-joke, along the lines that there could be no true philosophy of death, so he simply published a blank book. Alas, it was not to be.
"But I don't want to go among mad people."
"Oh, you can't help that. We're all mad here. I'm mad. You're mad."
"How do you know I'm mad?"
"You must be, or you wouldn't have come here."
Public Key ID: 057420A1