I've recently found Diana Sudyka website and I'm in love with her work. She's an illustrator from Chicago that creates for a broad range of areas: editorial, book, album art and screen printed gig posters. Musicians that she has created work for include: Andrew Bird, St. Vincent, The Black Keys, Iron & Wine, The Decemberists, and Modest Mouse. Artists who I personally recommend for you to listen because they're great (if you enjoy folk/americana genre of music). I remember that I've made lots of compliments about the art style they use so I'm happy to discover who did it.