I really enjoyed reading this book. It takes you all over the place, and it goes into incredible detail about the lives of different mathematicians and how they ended up. The author closely follows the development of mathematical theorems and how one person picks up the lead from the next. As a distinctly non-mathematician, I did occasionally get a little lost with the numbers.
However as Mario Livio is such an amazing writer, just as you think, I really am lost here, the book would take a turn in a completely direction and again you would feel you fully understood it for a while.
It is the sort of book that will provide the more mathematically gifted with endless facts and figures to amaze and amuse their friends. My most funny memory was the fact that men are always attracted to the most symmetrical women. Women find the smell of the most symmetrical attractive only at ovulation and the most symmetrical men themselves turn out to be the least reliable, commitment phobic amongst us, so it is not even all plain sailing for them!
I think that this would be a great gift for anyone looking for something to give the mature student, who has gained lots of background knowledge, and just needs a little boost in their understanding.