I enjoyed Impellizzeri's tone but would have preferred more footnotes, or references pertaining to each chapter's assertions in the back. There was a lot of really good information in the book, but if I'm not told precisely which study supports it, or what source she was using to support an idea, why should I believe it? Overall, though, a really useful book and good read. Maybe more of an intro-style book, but I'm glad I read it!