THE MASTER MIND OF MARS (1978) Acrylic - 21" x 27" The only John Carter cover in which I intentionally deviated from the story. The Master Mind does not appear in the actual scene but Lester del Rey thought the cover should go along with the title, so I took liberty placing the character there. 1/5 #sciencefiction #illustration #edgarriceburroughs #martiantales #barsoom #delreybooks