I've read several Amy Tan books. The Joy Luck Club was the first and certainly my favorite. I identified with the story and characters. The relationships between mothers and daughters and the dichotomy between the American and Chinese cultures spoke to me. My mother is Korean and I recognized some of the struggles in our own relationship.
Of course, this is what all writers hope to accomplish. Does the novel tell a great story that speaks to the reader on some level? Does the reader recognize that struggle for identity, love, hope, passion, acceptance, success, etc.?