The fact is that there is nothing as dreamy and poetic, nothing as radical, subversive, and psychedelic, as mathematics. It is every bit as mind blowing as cosmology or physics (mathematicians conceived of black holes long before astronomers actually found any), and allows more freedom of expression than poetry, art, or music (which depend heavily on properties of the physical universe). Mathematics is the purest of the arts, as well as the most misunderstood.
TL;DR: 8/10. I like the book; it is a captivating story written in a fantastic style, which I completely fell in love with! There are a few weird moments in the second part of the book, but they can be perceived realistically, depending on your perspective. Also, the climax of the novel truly deserves a “what a twist” meme reaction :-D
TL;DR: 6.5/10. Great start, excellent adventure, great humor (mostly concentrated in the first half of the book), very well written, but an unrealistic and much weaker ending. Human is a real bipedal life form of midrange intelligence, living a largely deluded existence on a small, waterlogged planet in a very lonely corner of the universe.