As is being reported in The Literary Saloon and Mumpsimus, Stanisław Lem's great novel Solaris has been translated from the original Polish into English for (shockingly) the first time. The existing edition is translated from Polish into French into English.
Apparently, because of rights issues, this new version is currently only available as an audiobook, though they plan on releasing an ebook and "hopefully" a print edition. Not sure what the deal is with the rights for this book or why the rights holders haven't bothered with a proper translation in the 50 years since the book came out, but someone should be deeply ashamed.