However as another side note regarding blue beings: None of the indigenous contactees ever mentioned any Blue Avians.
Humph ....

Ok, sometimes I can't help being silly.
Jokes apart, of course there is always the general question of credibility and plausibility. Each reader has to make up their own minds about this.
So we need to ask ourselves as open-minded skeptics: Can all or some of the reports come from by either (a) lying / pranking or (b) delusional people? I think most of it is not, although we cannot rule it out in some examples. Each case is different, each abductee or contactee is different with a different background story.
The author describes the people well and how she met them (often via intermediaries such as acquaintances or family members) and how they were 'convinced' to share their experiences They also seemed quite down-to-earth and normally minding their own daily business. Hardly anyone seemed crazy or drugged. What's more: Most of her interviewees did not even want to be interviewed in the first place and reveal their secrets. So none was out for money or fame and many were even very reluctant to come out.
I also would say that the author Ms Clarke is very credible and she only reports accurately what she was told (using a tape recorder); she is just the researcher and reporter without evaluating and asking for proof. She also does it all anonymously, never publishing names and addresses, a principle kept up throughout and agreed upon with the interviewed persons beforehand.
Indigenous people in general are said to be secretive about their relation to ET stories (which they call Star People, Star Ancestors, or Sky Gods) and other spiritual / metaphysical experiences and legends, all stays in-group and is being sealed off from outsiders, sometimes even between tribes.
I admit I still had 'a few' problems with some of the accounts as they stretch your imagination and some even seem to be taken straight out of Hollywood sci-fi movies. But then again: aren't Sci-fi and Fantasy movies mirrors of the larger reality and channelled knowledge, maybe? So I leave some of it open for me. Most accounts though seemed quite believable, as are the people telling them. All is fascinating.
Here is the author in a 2015 YouTube interview by the Skeptiko podcast after her first book was out:
A transcript from the Skeptiko website if you are more keen on reading:
https://skeptiko.com/ardy-sixkiller-...ufo-phenomena/
About her this book that is being talked about (the one that's now hard to get):
https://www.goodreads.com/book/show/...th-star-people

A noted American Indian researcher offers a collection of intimate narratives of encounters between contemporary American Indians & 'Star People'. The 1st-person accounts, described as conscious experiences & recalled without hypnosis, reveal a worldview that unquestionably accepts the reality of Star People. The stories also reveal cultures that almost universally regard them as ancestors, which allows for interactions that take place without fear & helps explain the uniqueness of the experiences. The stories are told by people from all walks of life. Some had graduate degrees; others never attended school. Some were adept at technology; others had never used a cell phone, owned a computer or a tv. A few of the stories are about events that occurred before the 1947 Roswell incident, however, the majority of the events took place between 1990 & 2010. This book significantly contributes to the knowledge about UFOs from a group that until now have mostly remained silent. Readers will likely never look at the UFO phenomenon in the same way again.
Dr Clarke, Professor Emeritus at Montana State University, has dedicated her life & career to working with indigenous populations. She's the author of several children's books & the bestselling 'Sisters in the Blood'. Retired from academia, she continues to work as a consultant to indigenous communities worldwide. See her
www.sixkiller.com website.