The Religion of Odin
by Irv Slauson
1978

Excerpt:

This is a book about a religion, A religion that was hundreds of years old at the time of Christ and has had an unbroken, though often times clandestine, existence from then to our own times. Followers of the swirling and often conflicting groups of the Odinists still number in the hundreds of thousand and very likely in the low millions, In Germany alone about 1935, there were estimated to be 2,000,000 people who adhered to the beliefs of the New Heathen as they were then called.