This book provides an engaging overview of how and why scientists travel deep into caves and caverns. Large photos and short paragraphs of easy-to-read text make the book accessible and engaging, and its many informative sidebars add fascinating facts. The book also includes an infographic listing skills needed for working in this field, comprehension questions, a glossary, an index, and a list of resources for further reading. This book is part of the Apex Honors imprint, which has a reading level of grades 3-4. However, the imprint is specifically designed for older readers, with interest levels of grades 3-9.