An interesting story about medical research, and the family whose mother's cells lived on long past her death. I found the scientific pieces really absorbing, but the more personal side of the story was uneven. An additional negative for me was the audiobook narration, which was problematic in a few different ways. I'm glad to have finally read this book, but it didn't entirely live up to my expectations, based on all the rave reviews I remember from when it was released.