Below are books and a link to audiobooks that provide historical context for the unfolding Russia-Ukraine re-invasion and war. With increased interest on this subject, some books are currently backordered and waiting for publisher reprints. However you can find quite a few of them available now as audiobooks on Libro.fm. See them here.
Thank you to Henrikas Bliudzius for compiling much of this list and sharing it in his LitHub article.
(Please note: This book cannot be returned.)