Really enjoyed this author's previous book, [b:Here's Looking at Euclid: A Surprising Excursion Through the Astonishing World of Math|7901962|Here's Looking at Euclid A Surprising Excursion Through the Astonishing World of Math|Alex Bellos|https://d.gr-assets.com/books/1433491650s/7901962.jpg|11157611], which was a lot of fun to read and very accessible to the math-challenged. This book has about the same amount of humor but dives a little deeper into complicated math.

Really enjoyed the sections on triangles, e, and i, the latter including the Mandelbrot set. I believe the author went a little too far into cones, and the chapter topics as a whole feel more scattered than the previous book. Good, but not great.