After by Nikki Gemmell Fourth Estate, 2017, 304 pages, $29.99 ____________________________   When I heard about Nikki Gemmell’s new book, After, I faced a dilemma. A memoir about the “euthanasia death” of her mother, Elayn Gemmell, would bring up my own memories. I went to the bookshop twice before I purchased. The story opens with the drama of police at the door. The reader then shares a journey towards making some kind of sense from the pain. What do you call this death? Suicide doesn’t sit well and “euthanasia death” doesn’t quite fit either. Gemmell struggles. Structured like diary entries,…