Petrie, Kristin

An introduction to the digestive system and its role in the human body, looking at the mouth, throat and epiglottis, esophagus, stomach, and intestines, and discussing digestive problems and how to avoid them.

This book introduces chameleons, including their physical characteristics, behavior, diet, reproduction, and care.

Introduces children to different types of ticks, explaining what they look like, where they are found, how they find a host, and what to do if they find one.

Photographs, illustrations, and maps describe the life of Sacagawea, the Shoshone woman who helped Lewis and Clark on their westward expedition.

Examines the lives and accomplishments of Meriwether Lewis and William Clark, discussing their early years in late eighteenth-century America, and telling of their grand exploration of the country's expanding frontier on a mission for President Thomas Jefferson.

Photographs and easy-to-follow text introduce children to different types of cockroaches, describing their physical characteristics, habitat, favorite foods, threat to humans, and other related topics.

Describes the characteristics of ants, looks at their body parts, organs, life cycle, habitats, and appetites, and discusses their interactions with humans and other enemies.

Text and photographs describe the physical characteristics, behavior, and habitat of the nocturnal tarsiers of Southeast Asia.

Photographs, illustrations, and maps describe the life of Rene-Robert Cavelier de La Salle, who was the first European to explore the length of the Mississippi River in the late 1600s.

Presents a short study of striped dolphins, and discusses what they look like, where they live, their senses and behaviors, how they care for their young, and other interesting facts about them.