The Enchanted Wanderer and Other Stories by Nikolai Leskov. English translation by Richard Pevear and Larissa Volokhonsky. First edition hardback from Knopf’s Borzoi imprint. Jacket design by Peter Mendelsund. There are still a few tales in here that I haven’t read, most notably the titular novella.
The Silmarillion by J.R.R. Tolkien (and arguably, Christopher Tolkien, whose edits gave the book shape and form). 1983 first American edition trade paperback by Houghton Mifflin. No designer credited, which is a damn shame because I love this book cover. This is maybe the first book I recall buying with my own money.
Miruna, A Tale by Bogdan Suceavă. Translated from the Romanian by Alistair Ian Blyth. 2014 trade paperback by Twisted Spoon Press. Cover design by Dan Myer. A strange and remarkable novella set in the Carpathians that moves time and history into fantasy storytelling.