Poul Anderson's _The Broken Sword_ is on sale (it's been on sale in a different edition previously, so check your library):
Historical fantasy.
$1.99
https://www.amazon.com/dp/B00PI181JI
I believe it's on other stores --- published the same year as _The Fellowship of the Ring_ it was a ground-breaking and influential work (Michael Moorcock cites it as an influence). In a similar vein is his _The Merman's Children_ --- _Three Hearts and Three Lions_ and _A Midsummer Tempest_ are much lighter in tone.