What other books related to National Parks are good to read?

I have already read these following books below and would like to read more books related to National Parks





1.) Death in Yellowstone: Accidents and Foolhardiness in the First National Park





2.) Death, Daring and Disaster - Search and Rescue in the National Park





3.) The Last Season (its about a park ranger, Randy Morganson, that went missing himself) VERY GOOD BOOK!





Thanks!

What other books related to National Parks are good to read?
Read all of the books by Nevada Barr. She is a forest ranger herself and still finds time to write Anna Pidgeon mysteries. Very good reads. Anna is a forest ranger assigned to different National Parks and gets involved with murders and missing persons in all of the books while trying to achieve compliance with all the rules and have a love life too. Very good reads.