I got the book not too long ago, & I have also read 'Germansk mytologi og verdensanskuelse', which was quite interesting as well.
He brings up several things that got me thinking, but I still take most of what he writes with several grains of salt. I'd recommend reading it, but I'd also warn people that he tends to draw faulty conclusions & work his belief-system into fitting with the Norse mythology.
“I am afraid, my dear Watson, that most of your conclusions were erroneous. When I said that you stimulated me I meant, to be frank, that in noting your fallacies I was occasionally guided towards the truth.”
— Sir Arthur Conan Doyle, The Hound of the Baskervilles