A collection of unique and unusual works of fiction inspired by ancient Scandinavian (and Finnish) mythology, folklore, and the sagas of yore. Not the usual suspects such as J.R.R. Tolkien, Neil Gaiman, Bernard Cornwell, Rick Riordan, etc. or the various other mainstream titles that might feature an elf or the occasional nod to Odin, but instead an exclusive focus on overlooked/hard-to-find classics and more recent offerings that are quirky, outside the mainstream, or both. Note that a number of these titles are not readily available in the U.S. and I have included them in the footer notes instead. These titles are no less worthy; in fact, some of them are the best. It's just a matter of Bookshop's own limitations (but Bookshop isn't Amazon so I still skål to its honor). The list is in no particular order with the exception that my own two books appear at top because I'm that sort of person.

The following excellent books are, alas, not presently available through Bookshop (in some cases, because they are only available via UK retailers), but are so, so very worthy of attention:

The Last Berserker by Angus Donald

An excellent adventure novel and the first in a series set during the formative days of the Carolingian Empire and its attempts to encroach on the Old North. This one provides an exhilarating journey through old Europe from Denmark to France and connects to ancient Germanic folklore in a unique way. Full of action, a total page-turner. A shame no U.S. publisher has picked it up. 

Swell by Corwin Ericson

A hilarious and bizarre adventure set on an island off the coast of New England that features an antagonistic warrior-maiden, a sour-milk guzzling skald, North Atlantic whale-herding, and additional influences from Finnish mythology. This one was actually a U.S. release but the publisher unfortunately went out of business so it's harder to find now.

Nutcase by Tony Williams

An amazing retelling of The Saga of Grettir the Strong set in a crime-ridden and destitute part of modern-day England.

The Hurricane Party by Klas Östergren

A post-apocalyptic take on the events that set Ragnarök in motion. Set in a grim, futuristic Stockholm and its archipelago. The most imaginative reinvention of the Norse myths I have encountered and, sadly, almost entirely disregarded by the English-language publishing industry. But the English-language publishing industry is comprised solely of total bastards, so it's fitting. 

War of the Gods by Poul Anderson

Poul Anderson is better known for his science fiction, but his Norse-inspired fantasy is something special if you can find it. I listed The Broken Sword above, but War of the Gods is probably my favourite of his (not available through Bookshop, however). Also worth seeking out are: The Last Viking Trilogy, Mother of Kings, and Hrolf Kraki's Saga. 

Rhinegold by Stephan Grundy

Rhinegold is an out-of-print retelling of The Saga of the Volsungs originally released in 1994 and written by Stephan Grundy, also known as Kveldulf Gundarsson (author of Our Troth and other Germanic religion books). Rhinegold is a fantastic tale; it stays true to the original while conveying it in the format of a modern novel. His writing is effective and descriptive and the book's a joy to read. Very worth picking up if you're the sort of person who is actually reading this list and you manage to find a copy somewhere. But note: at over 800 pages, Rhinegold is not a short read.