Uncle Scrooge's zoo houses the world's rarest animals, until he sends Donald and Gladstone on Carl Barks' "Trail of the Unicorn!" Then Scrooge himself stars in Kari Korhonen's "Treasure Treasury," and Mickey battles a monster puma in Ken Hultgren's must-requested "Seven-Colored Terror!" Vintage 1932 Floyd Gottfredson gags wrap the book.