For one of my book groups, Turn of Mind by Alice LaPlante wasn’t at all what I was expecting. When I heard it was a book about a woman with dementia, I imagined a Lifetime movie. Instead, it’s something else entirely. The main character, Jennifer White, is a retired hand surgeon whose dementia is getting worse. Her best friend was recently murdered, and she’s the prime suspect. Unfortunately, she’s not a reliable narrator, and this book plays skillfully with that, telling us parts of her past and present as she goes, filling in the big picture a little at a time. I was very worried that the end wouldn’t pan out. This is the kind of thriller that depends very much on the strength of its Ta Da moment at the end. I think the author mostly pulled it off. There were some implausibilities that nagged, but it was largely satisfying. It engaged me from beginning to end, and I found the main character fascinating.