If the material in this book intrigued you, you may find more depth in the following fine works. It is tempting to “just Google” to learn more, but most of the best knowledge is to be found in actual books. The authors of the literature I cite below have done the hard work for you to sort out what is good and what is not good.

A well stocked academic library will have all these books, and even if not affiliated with a university, you may find it possible to gain access to their collections.

Here goes: