Corey has written several picture books which focus on historical women and how they challenged convention: You Forgot Your Skirt, Amelia Bloomer! A Very Improper Story (2000), Players in Pigtails (2003),Milly and the Macy's Parade (2006), Mermaid Queen (2009, the story of swimmer Annette Kellerman), and Here Come the Girl Scouts! (2012). Corey has also written books featuring Babe and Step into Reading biographies of Joan of Arc, Hilary Clinton, Barack Obama, and Malala Yousafzai.
- Let's Go to the Fun Park! (1999)
- Grouchland Surprises (1999)
- Where Is Elmo's Blanket? (1999)
- What Color Is Elmo? (2000)
- Cookie Bakes Up Shapes! (2000)