| Can You Count to a Googol? by Robert E. Wells 205 exemplar, 12 recensioner | |
| Did a Dinosaur Drink This Water? by Robert E. Wells 144 exemplar, 24 recensioner | |
| How Do You Lift a Lion? by Robert E. Wells 445 exemplar, 11 recensioner | |
| What's Faster Than a Speeding Cheetah? by Robert E. Wells 123 exemplar, 1 recension | |
| What's smaller than a pygmy shrew? by Robert E. Wells 521 exemplar, 13 recensioner | |
| What's So Special about Planet Earth? by Robert E. Wells 67 exemplar | |
| What's Older Than a Giant Tortoise? by Robert E. Wells 37 exemplar, 2 recensioner | |
| Is a Blue Whale the Biggest Thing There Is? by Robert E. Wells 655 exemplar, 15 recensioner | |
| Can We Share the World with Tigers? by Robert E. Wells 9 exemplar, 2 recensioner | |
| Why Do Elephants Need the Sun? by Robert E. Wells 83 exemplar, 4 recensioner | |
| How Do You Know What Time It Is? by Robert E. Wells 181 exemplar, 4 recensioner | |
| Polar Bear, Why Is Your World Melting? by Robert E. Wells 50 exemplar, 1 recension |