NEL, Philip. The Annotated Cat: Under the Hats of Seuss and His Cats.

(New York, NY): Random House, 2007.  First edition.  Square quarto.  189 pages.  A nice study of the Seuss cat books.  Includes two essays by Seuss, a magazine story, unpublished material and more to provide a deeper understanding of these remarkable works.  A very good copy in dust jacket.