I bought this book as a start point for my Mathematics Masters Project on the Riemann Hypothesis and the Riemann Zeta Function.
It is very clear, easy to read, and is aimed at those who want to further their understanding of the topic (without getting bogged down with loads of heavy Maths). The chapters alternate between Mathematics and historical context which breaks up the book nicely, as you can skip parts you don't like the look of. By the end of the book, the author gets to some fairly complex ideas which would require additional sources to fully understand.
Would definitely recommend this to Mathematics students and anyone interested in the Riemann Hypothesis.