What is the author's tone in the nonfiction book, The Lost City of the Monkey God?

Preston's book reads, for the most part, like an adventure story, though he sometimes dips into background about the history of Mosquitia, the culture of the pre-Columbian people who lived there, and the disease leishmaniasis. He is not a professional archaeologist but a journalist, and he covers the trip as a journalist might, not as an academic.

He also has obvious regard and interest in the pre-Columbian people who occupied Mosquitia and wants to know more about them. He describes the area of T1 as a kind of Eden, and he enjoys being in the untouched rainforest and experiencing life in a remote area far from civilization. He also has a sympathetic tone towards the Honduran people, many of whom dwell in poverty and in a situation in which they are subjected to violence by drug dealers and drug wars.

At the end of the book, Preston develops a bit of a cautionary tone as he relates the dangers that an outbreak of leishmaniasis and its spread northward to the U.S. as a result of climate change pose for Americans. He also warns the reader that civilizations in the past show us that nothing is permanent and that even seemingly powerful civilizations can suddenly vanish.