I did a little search about available literature on gaps between primes, and, although I was confident in thinking that books about that topic are very rare, I really wasn´t sure that I will find exactly not a single one?
I found an article by Zhang, of which I knew before, but although I knew that really not much is known about that topic, I expected that there is at least one book in which all the rigorous results about gaps are collected.
So, because that topic interests me, what would you suggest me to read, I mean, which book would be appropriate as at least prerequisite to learn more about that topic?
Also, I am really not skilled enough in intersections of number theory with complex-variable functions theory, so I would more like some recommendations of number theory books that have much more algebraic than analytic flavour.