What is the author's tone in Death in Yellowstone: Accidents and Foolhardiness in the First National Park by Lee Whittlesey?

Death in Yellowstone's tone reflects its author's aims. On the one hand, the author wants to communicate the tragedy of the three hundred deaths caused by Yellowstone-specific causes within the park. On the other hand, he wants to both hold responsible those who caused the needless suffering and death in the park when it was avoidable and to warn those who might be irresponsible to take the dangers of the wilderness more seriously, respect the warnings in the park, read the warning literature and not take unnecessary risks.