11 Dec 2018 Martin Shannon gulfcoast bookjacket sketches Michael Art bookjacket, gouache, sketchbook, watercolor 0 Two watercolor sketch ideas for Dad’s bookjacket, but–while I like the feel–this wasn’t a good fit for the book content. Too tropical, too Robinson Crusoe. Pencil and watercolor on paper. 4 x 6″ Pencil and watercolor on paper. 3 x 4″