The Last of His Mind is not a laugh a minute. But if it’s not a fun read, perhaps it’s an important one. The subtitle, “A Year in the Shadow of Alzheimer’s,” acknowledges the subject matter as that terror hiding in our closets. We, or someone close to us, will outlive our mind. The value of this book is in its engagement with the demon, bringing it to recognizable size and letting us know how one man met his father’s diminishing abilities.