I had seen Adam Nickel’s illustrations around and always thought they were great, but never knew who did them until now:
Open edition and signed by the artist. Fine art print on natural white, matte, ultra smooth, 100% cotton rag, acid and lignin free 180GSM archival paper using an advanced digital dry ink method to ensure vibrant image quality. The small sized (A3) prints they are printed using offset lithograph. Shipping is from Australia and takes approximately 1-2 weeks to the US (takes a little longer for Europe, a little less for Asia). Prints are sent in a heavy duty tube mailer.
Check out http://www.adamnickel.com/prints.html for more.