Before bothering read what are essentially works that are commentaries on 'nazi occultism', why not start with actual and valid works relevant to the ideas themselves?
Start with "The Lightning and the Sun" by Savatri Devi
Follow up with the works of Julius Evola.
There is actually a very well constructed site called juliusevola.net which has a text archive of his works and articles. Most of Devi's work can be found online with a quick search.
On a side note, and it is kind of funny, the fourth book you have listed was written by two friends of mine. Dr. Flowers (Stephen E. FLowers) is a proffesor of Germanic Philology in Texas and Mike Moynahan is a musician of sorts.
