| title | media type | ISBN-13 | year of publication |
|---|
| Ancient Coins Were Shaped Like Hams: and Other Freaky Facts About Coins, Bills, and Counterfeiting | Paperback | 978-1-4048-3755-3 | 2008 |
| Cows Sweat Through Their Noses: and Other Freaky Facts About Animal Habits, Characteristics, and Homes | " | 978-1-4048-3754-6 | 2008 |
| Earth Is Like a Giant Magnet: and Other Freaky Facts About Planets, Oceans, and Volcanoes | " | 978-1-4048-3757-7 | 2008 |
| Elephant boy | | 978-0-02-182270-6 | 1997 |
| Elephants Can't Jump & Other Freaky Facts About Animals | Paperback | 978-0-8041-0351-0 | 1988 |
| Elephants Can't Jump & Other Freaky Facts About Animals | Hardcover | 978-0-525-67155-8 | 1985 |
| Flick a Switch | " | 978-0-8234-1729-2 | 2003 |
| How to Write a Children's Book and Get It Published | Paperback | 978-0-471-67619-5 | 2004 |
| How to Write a Children's Book and Get It Published | Hardcover | 978-0-684-19343-4 | 1991 |
| How to Write a Children's Book and Get It Published | " | 978-0-684-18055-7 | 1984 |
| It Is Illegal Quac: 2 | " | 978-0-525-67257-9 | 1988 |
| It Is Illegal Quack Like a Duck and Other Freaky Laws | " | 978-0-525-67250-0 | 1988 |
| It's Robert! The Chocolate-Covered Worms | Paperback | 978-0-545-07192-5 | 2005 |
| Library Book: Drip! Drop! | " | 978-0-8234-1459-8 | 2000 |
| Oh No, It's Robert | " | 978-0-439-23544-0 | 2003 |
| Oh No, It's Robert | Hardcover | 978-0-8126-2934-7 | 1999 |
| Robert and the Attack of the Giant Tarantula | Paperback | 978-0-439-23545-7 | 2003 |
| Robert and the Back-to-School Special | Hardcover | 978-0-8126-2662-9 | 2002 |
| Robert And The Embarrassing Secret | Paperback | 978-0-439-44378-4 | 1948 |
| Robert and the Great Escape | Hardcover | 978-0-8126-2700-8 | 2003 |
| Robert and the Great Pepperoni | " | 978-0-8126-2825-8 | 2001 |
| Robert and the Happy Endings | " | 978-0-8126-2748-0 | 2007 |
| Robert and the Lemming Problem | " | 978-0-8126-2686-5 | 2003 |
| Robert and the Practical Jokes | " | 978-0-8126-2741-1 | 2006 |
| Robert and the Snake Escape | Paperback | 978-0-439-23546-4 | 2001 |
| Robert and the Sneaker Snobs | " | 978-0-439-35375-5 | 2002 |
| Robert and the Triple Rotten Day | " | 978-0-439-58747-1 | 2004 |
| Robert and the Weird and Wacky Facts | Hardcover | 978-0-8126-2653-7 | 2002 |
| Robert Finds a Way | " | 978-0-8126-2734-3 | 2005 |
| Robert Goes to Camp | " | 978-0-8126-2753-4 | 2007 |
| Skipper: The humpback whale | Paperback | 978-0-02-182292-8 | 1997 |
| The Great Egghead Challenge | " | 978-0-545-07193-2 | 2005 |
| The Last Cow on the White House Lawn and Other Little Known** | " | 978-0-8041-0658-0 | 1992 |
| The Man in the Moon Is Upside Down in Argentina: and Other Freaky Facts About Geography | " | 978-0-8041-0659-7 | 1990 |
| Too Cold To Hatch a Dinosaur: And Other Freaky Facts About the Weather | " | 978-0-8041-0897-3 | 1993 |
| Where's that chick? | | 978-0-02-182266-9 | 1997 |
| Winter Lullaby | Paperback | 978-0-15-216808-7 | 2002 |
| Winter Lullaby | Hardcover | 978-0-15-201403-2 | 1998 |
| You Blink Twelve Times a Minute: and Other Freaky Facts About the Human Body | Paperback | 978-1-4048-4121-5 | 2008 |
| You Can't Count a Billion Dollars: & Other Little-Known Facts About Money | " | 978-0-8041-0657-3 | 1991 |
| You Can't Sneeze with Your Eye | " | 978-0-8041-9812-7 | 1993 |
| You Can't Sneeze with Your Eyes Open | Hardcover | 978-0-525-67185-5 | 1986 |
| You Can't Sneeze With Your Eyes Open & Other Freaky Facts About The Human Body | Paperback | 978-0-8041-0350-3 | 1988 |
| Your Skin Weighs More Than Your Brain: and Other Freaky Facts About Your Skin, Skeleton, and Other Body Parts | " | 978-1-4048-3756-0 | 2008 |