Don't read this book. I know, it's going to draw you in by promising to be a quirky tale about two people who love each other and don't realize that they're both secretly involved in an illicit folk craft: producing buttons, snuff boxes, and other gentlemen's accessories that depict sexual acts. Lorna is the skilled carver that can bring things to life, Herb is the mechanician who engineers the tiny moving pieces. But outside of this pretty small part of the book, this is your standard, boring, "span of the century" love story.
Herb and Lorna meet, fall in love (various trials ensue), Herb pulls himself up by his bootstraps, serves in WWI, they survive the Great Depression, they deal with WWII, they have kids, they have wacky neighbors, they move to an artist colony, the end. Kraft is exploring the lives of his maternal grandparents here, but he forgot that other people might not be as interested in his family history as he is.