I might recommend a good general non fictional look: Of Norwegian Ways by Bent Vanberg Dillon Press 1979.
Other books on my shelf are:
From Fjord to Prairie by Simon Johnson 1916 From Woods and Fields by Lars Opsata (translation by Edna Rude)1976 (Hallingdal area) Njal's Saga (Penguin Classics) translated & introduced by Magnus Magnusson & Hermann Palsson 1974 (Viking age) Kristin Lavransdatter (trilogy) by Sigrid Undset 1959 (medieval)
Most of these should be in American public libraries or available through inter library loan.