C.A. · Chris Arvetix · Chris Arvidson
| title | media type | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|---|
| What Is a Butterfly? | Hardcover | 978-0-02-689001-4 | 1987 | Carole Palmer |
| What Is a Desert? | " | 978-0-02-689003-8 | 1987 | " |
| What Is a Mountain? | " | 978-0-02-689004-5 | 1987 | " |
| What Is a Rainbow | " | 978-0-02-688810-3 | 1988 | " |
| What Is a Volcano? | " | 978-0-528-82434-0 | 1983 | |
| What Is the Moon? | " | 978-0-02-689007-6 | 1987 | Carole Palmer |
| Why Does It Float | " | 978-0-528-82399-2 | 1983 | " |
| Why Does It Snow? | " | 978-0-528-82823-2 | 1986 | " |
| Why Does It Thunder and Lightning? | Paperback | 978-0-02-688813-4 | 1988 | " |
| Why Does It Thunder and Lightning? | Hardcover | 978-0-528-82671-9 | 1985 | Carole Palmer · James Buckley |
| Why Do Leaves Change Color | " | 978-0-528-82822-5 | 1986 | Carole Palmer |
| Why Is It Cold? | " | 978-0-02-689005-2 | 1987 | " |
| Why Is It Dark? | " | 978-0-528-82075-5 | 1984 | |
| Why is it hot? | " | 978-0-02-689006-9 | 1987 | |
| Why Is the Grass Green? | Taschenbuch | 978-0-02-688812-7 | 1988 | Carole Palmer |
| Why Is the Sky Blue? | Paperback | 978-0-02-688811-0 | 1988 | " |