Book/ Series: A Midsummer Tempest by Poul Anderson (Operation Otherworld Series Book #3, but can be read as standalone)
Published: 1974
Book Tropes: Alternative English History/ Fantasy
Recommended for fans of: Shakespeare (esp. The Tempest and A Midsummer Night’s Dream), R.L. Stevenson (esp. The Black Arrow)
Awards: 1975 Mythopoeic Award
Some time back, LibraryThing recommended A Midsummer Tempest for those who like Shakespeare’s plays, steampunk, the old adventure classics and medieval English history. I’ll second that recommendation, as long as you are certain that this blend is exactly what you’re looking for.