25 Cats Named Sam and One Blue Cat is comprised of 18 hand-colored offset lithographs (one laid-on to cover) by Warhol. The accompanying text was written by his then-lover, Charles Lisanby. ...The hand-coloring of the lithographs was done at "coloring parties" with Warhol's friends... The calligraphy is by Julia Warhola, Warhol's mother. Her errors were uncorrected by Warhol, who appreciated human imperfections." http://www.booktryst.com/2011/04/rare-warhol-cats-book-estimated-to-sell.html