- It's perfectly normal, a book about changing bodies, growing up, sex and sexual health, Robie H. Harris ; illustrated by Michael Emberley
- Who has what?, all about girls' bodies and boys' bodies, Robie H. Harris ; illustrated by Nadine Bernard Westcott
- Who?, a celebration of babies, written by Robie H. Harris ; illustrated by Natascha Rosenberg
- It's so amazing!, a book about eggs, sperm, birth, babies, and families, Robie H. Harris ; illustrated by Michael Emberley
- Who we are!, all about being the same and being different, Robie H. Harris ; illustrated by Nadine Bernard Westcott
- What's so yummy?, all about eating well and feeling good, Robie H. Harris ; illustrated by Nadine Bernard Westcott
- The day Leo said I hate you, by Robie H. Harris ; illustrated by Molly Bang
- It's not the stork!, a book about girls, boys, babies, bodies, families, and friends, Robie H. Harris ; illustrated by Michael Emberley
- Crash! boom!, a math tale, Robie H. Harris ; illustrated by Chris Chatterton
- What's in there?, all about before you were born, Robie H. Harris; illustrated by Nadine Bernard Westcott
- Harris, Robie H, Let's talk about you and me
- It's perfectly normal, a book about changing bodies, growing up, sex, and sexual health, Robie H. Harris ; illustrated by Michael Emberley
- Who's in my family?, all about our families, [text by Robie H. Harris ; illustrations by Nadine Bernard Westcott]