I have read all the Nevada Barr books. They give insite to our National Parks as well as be great mystery reads.

Great story about Carlsbad Caverns and caving,
The facilitator included a video of the caves that were mentioned in the book.

Great setting for a murder. The journey allowed me a tiny peak into the lives of spelunkers. Caving involves an incredible level of trust, leadership and dependence on others not easily enjoyed by most people.