Title: Machines
First published: 1997
Description: Uses a question-and-answer format as well as quizzes and other activities to describe machines, present their history, explain how they operate, and discuss how they change the world.
Subjects: Machinery, Juvenile literature, Miscellanea, Questions and answers, Children: Grades 3-4, Children's Books/Ages 9-12 Nonfiction, Children's 9-12 - Technical, Technology
LC classification: TJ147 .G75 1998