Presents a children's study of librarians, what they do, how they label books, the purpose of the bar codes, and how they help people find information.
Depicts the sanitation worker's role in maintaining a clean community. Explains where recyclables go and how trash is collected and dumped in a landfill. Describes the day-to-day working conditions with color photographs of real sanitation workers on the job. Includes a history, glossary and suggestions for further reading.