I don't have an album cover, but the soundtrack to Oh Brother Where Art Thou got me into bluegrass big time. I developed a love for country music, old blues, old spiritual, and anything with just a touch of twang, which lead me to learn about the origins of where the music came from. Heck, it even helped inspire a fan fic I wrote called The Private Scrapbook, which you can find here if you're interested: http://www.fimfiction.net/story/100158/the-private-scrapbook