What kind of animals live and work with people? When did humans and animals begin working together? Do some animals cause trouble for humans? Read this book to find out! Readers will travel the world to meet assistance dogs, invasive pests, and strong horses. Readers will learn about the different relationships humans have with animals and how we've been able to work with them to make both our lives better. Stunning photography introduces individual animals, and a handy glossary helps to expand readers' vocabulary. For more information on the daily lives of animals, check out other titles in the Animals at Work series!