Definitely a worthwhile read. It was the first book I read on my kindle, which was fine except I didn't realize the helpful material was at the end of the book until I got to it. I liked Skloot's writing style, which made the science pretty accessible and Henrietta's story compelling. It's fascinating that taking one person and looking into her past and her family's future could result in such interesting characters and sad commentary on life for some African Americans in the 20th century. The second half of the book wasn't as strong. I understand why Skloot wanted to profile Deborah, but it felt a little drawn-out to me and I started to feel ready for the book to end.The afterword was critical, to me, as I wasn't sure how I felt about use of tissue and consent throughout the book, and this outlined the issue more clearly.