It is incoherent as a book - different articles are aimed at entirely different readers. But there are good articles! A few groups:
I learned stuff!: The Inescapable Casino, Median voter theorem, Decades-old CS conjecture solved, Three-body problem, On your mark get set multiply
Usually new intuitions, nothing formal. These were cool though. I wish the book was all like this.
I didn't learn much but it was an entertaining story about math or mathematicians: Taking Newton into the quantum world, Sid Sackson, Rubik's Cube, tenth Heegner number, Gauss Easter
These were fun. "I didn't learn much" may be particular to me (in some cases like Rubik because I already had readit); I don't mean that they're fluff.
What the actual Fuchs: Kleinian and Quasi-Fuchsian Groups, Hyperbolic 3-manifold, Higher Dimensional Geometries
These read like journal articles. By that I mean, I'm super lost. I'm like angry that they're included, because I bet 95% of readers (a weird self-selecting group in the first place) will just glaze over at best or get intimidated at worst.