Look through darkbooks.org for heathen or any occult books... The Eddas are important but Perce told me about Feeding the Flames by Galina Krasskova,and it changed me.... Read it it's great, and when your ready Jotunbok. ... I'm working to get through it,I've got to read slowly,but great information. ..
It honestly depends what you want, and what you desire in the book.
Lately for me, i've been in a major pantheon movement, and i decided to study the norse. While i can't recommend mythology books, i would say to check it ot. For mythology books can help learn about who the god is,acts,ect.