Here comes a link to the different e-book providers categorization into research areas/subjects:
(You could of course do a search in Oria.no for e-books only and add your own keywords or topic/topics of interest and search across the different e-book providers)
Anthropology
Ebrary
Jstor
Project Muse
Taylor & Francis
Geography
Ebrary:
Atlases
Environmental sciences
Geography in general
Maps
Physical geography