Goddess of the North by Lynda C. Welch

Goddess of the North: A Comprehensive Exploration of the Norse Godesses, from Antiquity to the Modern Age
by Lynda C. Welch

A thorough, academic look at the past, present, and future of Norse polytheism.

Welch highlights many Norse goddesses as well as other divine females of the Norse pantheon - Valkyries, Norns, Giantesses, Disir - and in a straightforward manner, makes a definitive case for the primordial goddess.