Book cover sketches

My musician is Art Tatum, jazz pianist. Jazz is mellow but at the same time it has a strong symphony of instruments. Therefore, I want to make use of black and white and monochromatic colors for the most part but add another color for emphasis. I think the book cover should lean more toward minimalist: not too many items, just strong concepts of content. In the back, I plan to add a little more; I want a background, and photographs to make it more real.