Amy Bloom gets right down to it in her 2022 memoir, “In Love: A Memoir of Love and Loss.” The city of Zurich and the fact of her husband Brian’s Alzheimer’s disease comes up in the first paragraph as the couple boards a plane headed to that Swiss city. Their purpose for the trip is revealed in the fourth paragraph, which begins with these two stout declarative sentences: “Dignitas’s office is in Zurich, and that’s where we’re headed. Dignitas is a Swiss nonprofit organization offering accompanied suicide.” Through the subsequent 200+ pages, the multi-talented, much-honored Bloom (novels, short stories, non-fiction,…