The "On Anatomy" book itself was part of a trilogy, with the others being "Progressive Anatomy" and "Fly in the Room Anatomy". Progressive Anatomy focuses on "abstract reductionism" of the body, breaking down muscle groupings in a structured format. Fly in the Room Anatomy provides a more playful, compositional view, describing the process as seeing the figure from all angles like a "fly in the room" and establishing composition. However, "On Anatomy" is specifically cited for its anatomical detail, building the structural knowledge needed to master the other books' more dynamic concepts.