Live Pterosaurs in America (2009, nonfiction) [second edition: Nov, 2010; third edition: Nov, 2011] is still [early 2010] more popular on Amazon.com than most of the many nonfiction cryptozoology books. Here is the main text of the title page:
Reports of giant flying “ptero-dactyls” in American skies—these have floated around the internet for years; but they had been mostly devoid of interview details. Until about 2005, even when an eyewitness was named, the interviewer was often anonymous; even when an eyewitness was credible, and the account published in a newspaper, the story was ridiculed, discouraging others who had also seen strange flying creatures. Where could eyewitnesses go? Who would believe them?
Since the two ropen expeditions of 2004, in Papua New Guinea, more Americans have become exposed to the amazing living-pterosaur investigations and the many resulting eyewitness interviews. Many web pages have sprung up, many of them by explorers themselves. But despite other web pages, by scornful critics who never went anywhere and never interviewed anyone, these two expeditions, and those that preceded and followed them, are causing an awakening, the birth of a new perspective about extinction-assumptions regarding pterosaurs.
How are sightings in the United States related to those in the Southwest Pacific? How do some apparent nocturnal pterosaurs pertain to bats (and how are bats irrelevant)? How could modern living pterosaurs have escaped scientific notice? These mysteries have slept in the dark, beyond the knowledge of almost all Americans . . . until now.
More about cryptozoology books (nonfiction) on modern living pterosaurs