I don’t remember the final conversation I had with my father. Toward the end of his life, he was hard to understand on the phone, as years of substance abuse and failing health had garbled his voice. He’d call at inopportune times — from a rehab center or hospital on the Cape, or the home of a friend in Florida he had somehow charmed his way into — and I’d hurry to get off the phone. Sometimes I’d find myself annoyed by his attempts to reconnect and let the call go to voice-mail. It had been more than 15 years since we’d had anything resembling a normal relationship, and more than 30 since he and my mother had. Even in my frustration, though, it was hard not to think of his looming existential deadline. I may never get the chance to talk to him again, I’d say to myself. I always did. Until, of course, I didn’t.

On good days, he’d tell me about his latest living situation, calling from a flip phone with a number that changed as frequently as a drug dealer’s. He’d ask about my writing and where I’d traveled to lately, seemingly in awe of all the opportunities I had that he didn’t; even approaching 40, I’d revert to the role of a young boy eager to