Around 2010, as an undergraduate in mathematics I fell absolutely in love with the Riemann hypothesis (RH), as one does. I spent Friday nights researching, reading and trying to understand this most famous of all math problems. In the process, I accrued a bundle of books on the topic. Some were better than others. The following are the ones I would recommend to another 21-year old interested in understanding the Riemann zeta function, its properties and the implications of Riemann’s hypothesis for the distribution of prime numbers.
Very informative, looking forward to purchasing several of your recommendations