Louise Fitzhugh Related books Harriet the Spy Harpercollins Childrens Books Harriet the Spy Harpercollins • 1970 Harriet the Spy Harpercollins Childrens Books • 1996 Harriet the spy Random House Children's Books • 2014 Harriet the Spy Yearling • 1984 Harriet the Spy Listening Library Harriet the Spy (A Trophy Bk.) Harpercollins Childrens Books • 1990 I AM FOUR Random House Childrens Books Long Secret HarperCollins Publishers Long Secret, The Harpercollins Childrens Books • 1990 The Long Secret Harpercollins