The cover is a photo collage of the late Prof. Richard P. Wool commemorating his extraordinary life. The left photograph is of Prof. Wool as captain at the helm of his yacht, the Sorbreeghan, enjoying his most beloved sport, sailing. The top right photograph shows his inquisitive nature, always studying and learning from the world around him. The bottom right photograph shows him at his best, lecturing on the topics he most loved. Prof. Wool will be forever remembered as the loving, compassionate and jubilant person he was.