Stalking the Riemann Hypothesis
I was a bit irritated at first by the aversion to the use of equations in this book. However, I began to realise that this wasn't in fact so important, as if you want equations they are available elsewhere, and Rockmore does make good use of diagrams and graphs. Also I felt that he gives a much better explanation of the link between the zeros of the zeta function and the distribution of the primes than other books I have read. The final chapter summarizes the current state of work in the area, but it is very short. For instance the work of de Branges is only mentioned briefly - I think Rockmore is keeping away from this controversy.