It's true that this book isn't actually fiction, but I don't think the genre affects the Literary Quality. It was well written, and it would attract the attention of both adults, and younger adults. Maybe even teens. I'm fifteen, and personally, I found it to be a very fascinating and interesting read.

In a whole, the book was excellent, and provided a brief little peek at the history of Mathematics. I recommend it for anybody that's interested in becoming a Mathematician, or just likes math. =)