Meredith Sue Willis Related books Higher Ground Simon & Schuster • 1981 In the Mountains of America Consortium Book Sales & Dist • 1994 Marco's Monster Harpercollins Childrens Books Marco's Monster Harpercollins Only Great Changes Simon & Schuster • 1985 The Secret Super Powers of Marco Harpercollins Childrens Books The Secret Super Powers of Marco Harpercollins