Nazi Occultism: Documented and Invented
A small Berlin vril group did exist, publishing Vril: Die kosmische Urkraft in 1930; Pauwels and Bergier's Le Matin des magiciens (1960) inflated it into a key Nazi order.
Nicholas Goodrick-Clarke, Black Sun (2002), on Willy Ley's 'Pseudoscience in Naziland' (1947), the 1930 Vril brochure and Pauwels and Bergier (1960); Bulwer-Lytton, The Coming Race (1871).
Documented völkisch occultism around early Nazism, beside the post-war myth of secret Nazi orders.