Books similar to "Primes of the form $x^2+ny^2$"

Question

Are there any other books which are similarly to the book "Primes of the form $x^2+ny^2$"? Basically, I want a book which starts with a very important classical problem ( in this case which primes can be represented in the form $x^2+ny^2$) ad use that problem as a motivation to introduce one mathematical topic (in this case class field theory and complex multiplication).