The theme of this wonderful story was epigenetics - how trauma responses are passed from generation to generation (imagine how a grandparent bit by a snake could lead to a fear of snakes in their children and grandchildren). By necessity then the story involves multiple generations, in this case all descended from a woman named Afong Moy. Each generation faces different struggles in different times and places, and all are so well described that each could be expanded into their own book. I've recommended this book to many and bought copies for others. Once you pick it up you'll find it difficult to put down.