P.J. White is the Branch Chief of Wildlife and Aquatic Resources at Yellowstone National Park. In his book "Can't Chew the Leather Anymore," White attempts to advance wildlife conservation in the Yellowstone area by providing the reader most recent and up-to-date scientific, social, and political issues both surrounding and influencing current park management. Additionally, White targets newer professionals and students of wildlife conservation by providing advice, lessons, and tribulations to avoid at least some of the pitfalls he encountered.