Books are shelved in general subject categories using the Library of Congress classification system. You may want to supplement your use of the catalog with browsing shelf areas for your topic. Below is a brief listing of some of the subject locations in the field of Scandinavian Studies.
The Nordic countries are bookish, and a surprising number of new books are published every year. For the curious English-speaker, these sites are helpful for discovering new books.
Swedish Book Review - also available in print; the website includes many articles and news about bestsellers drawn from Svensk Bokhandel.
Finnish-English Literary Cooperative - lists new and forthcoming books translated from Finnish.