The 3 book set of Children's books are great for young readers (9-12 years old). They all focus on the importance of preserving our environment and people with careers in the environmental field.

1) John Muir - My life in Nature by Joseph Cornell

2) Champions of the Ocean - part of the Earth Heroes Collection by Frank Hodgekins

3) Champions of the Wilderness - part of the Earth Heroes Collection by Carol Malnor