Under the Ground - 700 Headwords
Part of the Oxford Bookworms Factfiles series
This full-color series presents nonfiction topics about interesting places and subjects.
Each title features color photographs and a glossary to help with vocabulary comprehension.
Exercises and suggestions for project work are also included.
The books are graded at 400-to 1,400-word vocabulary levels.
Audio "CDs or "Cassettes are available for select titles.