A great book with many topics covered. But still, despite its size, it skips on a some subjects, ignoring some fundamental structures. May be it could have been reduced on history that does not directly relate to a topic, and on mathematicians as the selection criteria are debatable and add unnecessary volume. I suggest also less probability-statistics and more arithmetic and group theory (mainly permutation groups). I find it very readable, but still leaving me with some frustration as I often wanted more. For the editor, certainly a challenge in the selection and the degree of depth! In spite of all the weaknesses a great book in my library!