Shetterly tells a very complicated story spanning many decades very nicely. The book is chock full of history and science, woven into the lives of the incredible black women computers who did great work to make great things happen in very difficult circumstances. Easy and quick to read. The movie is better in many ways, more powerful in the telling of the racism facts, but necessarily dropping a lot of the science and earlier history of the computers' work on aviation in WWII. Read the book and enjoy the movie but don't expect them to the the same.