 Scholastic Book Guides, a series for schoolteachers, includes one "Catwings" volume.In 2002 and 2003 as "Catwings 5" and "Catwings 6", Le Guin published online editions of picture books "by Mrs. Katz's First Grade Class".Ten years after their last "Catwings" volume, Le Guin and Schindler created another picture book featuring a cat