I find we get very little exposure to Russian / slavic authors in North America, and when I do occasionally get to read one (including the classics but also some paperbacks) I suspect how much we must be missing by not having more of them readily available and marketed.
The Strugatskys have gone from being "Roadside Picnic" + a largely unobtainable back catalogue - I expensively amused myself by putting together a collection of pretty much everything they published in English a few years back. They have been celebrated (arguably, over-celebrated) by SF Masterworks and other recent publications so almost everything is back in print.
I enjoyed the new mix-up of "Lame Fate / Ugly Swans" (Ugly Swans was previously published as a standalone book, but is now intertwined with a book about the hassles of dealing with an AI-based evaluator of book quality, the book in question being Ugly Swans). The Doomed City was the original candidate for that, but was too long to fit - that's also available on SF Masterworks.
If you want to see where Iain M Banks extracted a good quarter of his ideas for the Culture, "Hard to be a God" is a decent read.
The book is much more detailed than the films. For example, in the book they go down to the “surface” of the alien and visit it… more than once as I recall. That’s not in the films.
Really a fantastic read with so many angles to interpret it from.
I read it more than ten years ago, but still remember the emotional experience it brought.