- Metamorphic rocks, by Melissa Stewart
- A rainbow of animals, Melissa Stewart
- How do bats fly in the dark?, by Melissa Stewart
- How do bees make honey?, by Melissa Stewart
- Here we grow, the secrets of hair and nails, by Melissa Stewart
- Ick!, delightfully disgusting animal dinners, dwellings, and defenses, Melissa Stewart
- Nifty noses up close, Melissa Stewart
- How do chameleons change color?, by Melissa Stewart
- Insect or spider?, how do you know?, Melissa Stewart
- Up your nose!, the secrets of schnozes and snouts, by Melissa Stewart
- Stewart, Melissa, Gross and goofy body
- Summertime sleepers, animals that estivate, Melissa Stewart ; illustrated by Sarah S. Brannen
- Small birds, by Melissa Stewart
- You've got nerve!, the secrets of the brain and nerves, by Melissa Stewart
- How do plants grow?, by Melissa Stewart
- Frog or toad?, how do you know?, Melissa Stewart
- Pump it up!, the secrets of the heart and blood, by Melissa Stewart
- It's spit-acular!, the secrets of saliva, by Melissa Stewart
- Life in a lake, Melissa Stewart
- A seed is the start, by Melissa Stewart
- Blasts of gas, the secrets of breathing, burping, and passing gas, by Melissa Stewart ; illustrated by Janet Hamlin
- Sedimentary rocks, by Melissa Stewart
- How do birds fly?, by Melissa Stewart
- Salamander or lizard, how do you know?, Melissa Stewart
- A place for butterflies, written by Melissa Stewart ; illustrated by Higgins Bond
- Why do we see rainbows?, by Melissa Stewart
- Under the snow, written by Melissa Stewart ; illustrated by Constance R. Bergum
- Moving and grooving, the secrets of muscles and bones, by Melissa Stewart
- A place for bats, written by Melissa Stewart ; illustrated by Higgins Bond
- Now hear this!, the secrets of ears and hearing, by Melissa Stewart
- Tree hole homes, and the animals that live in them, Melissa Stewart, Amy Hevron
- Igneous rocks, by Melissa Stewart
- Stewart, Melissa, Which animal is which?
- Stewart, Melissa, Animal bodies up close
- Rabbits, by Melissa Stewart
- The wonders of water, by Melissa Stewart
- A place for turtles, written by Melissa Stewart ; illustrated by Higgins Bond
- Stewart, Melissa, Rocks and minerals
- Shark or dolphin?, how do you know?, Melissa Stewart
- Butterfly or moth?, how do you know?, Melissa Stewart
- How do fish breathe underwater?, by Melissa Stewart
- Why do seasons change?, by Melissa Stewart
- Mega-predators of the past, written by Melissa Stewart ; illustrated by Howard Gray
- The skin you're in, the secrets of skin, by Melissa Stewart
- Terrific tongues up close, Melissa Stewart
- A place for birds, written by Melissa Stewart ; illustrated by Higgins Bond
- A place for frogs, written by Melissa Stewart ; illustrated by Higgins Bond
- Why does the moon change shape?, by Melissa Stewart
- Give me a hand, the secrets of hands, feet, arms, and legs, by Melissa Stewart
- Seashells, more than a home, Melissa Stewart ; illustrated by Sarah S. Brannen