Just finished reading the above two books.
Basically i've tasked myself with understanding the Yeti phenomenon and what the experts are saying. So googling around i've alighted on these two titles as providing quite different but quality perspectives. Both of them are positive on the existence of the north american yeti = bigfoot/sasquatch.
Sasquatch: Legend meets Science, is written by Professor Jeff Meldrum who is an expert on ape and human bipedal mechanics and the evolution of humans locomotion - https://www.isu.edu/biology/people/faculty---professors/jeffrey-meldrum/
there's also a film of the same title but note that the film strikes a tone that is much less definite than in the book.
The Hoopa Project, is wriiten by David Paulides who is retired police officer who has applied his training and witness interview experience to bigfoot research and claims to have read every book on the subject. The Hoopa are tribe of first nation people (pop 3000) who were granted an area of mountainous california say 150 years ago and have lived peacefully ever since. As an indian reservation the area is controlled by it's own officers (elders) and is exempt from normal state wide controls wrt game, fishing etc. American citizens do not have the right freely roam the area, requiring a permit to be off highways. As such it has perhaps remained "wilder".
The region is also a hotspot for bigfoot reports, so David Paulides seems to have invested a lot of time over two years meeting local people and chasing down witnesses to interview. Also having found good quality witnesses (in his opinion as a police officer) he enlists the help of Harvey Pratt who is also a police officer (40 years), USMC Vietnam vet etc who is also a FBI recognised police artist working on many high profile cases, to draw bigfoot during witness interviews. David Paulides also asks witnesses to sign an affidavit as he believes it adds an extra layer of witness concentration, most witnesses request corrections before signing.
I'd say that i'm pleased with my book choice and could recommend both.
So what's the takeaway?
Jeff Meldrum - there are now approximately 300 plaster casts of bigfoot footprints some of which are of extremely good quality, showing the surface features of the skin and behaviour of the foot and these to his expert eyes and others including other scientists and police experts are extremely convincing. Video footage is discussed including the Patterson - Gimlin film which he argues is genuine. Bigfoot maybe able to generate infrasound and even use it in hunting (as apparently tigers do). Witnesses have seen bigfoot hunt deer by simply running them down, not many bears can do that.
David Paulides / Harvey Pratt - this is interesting because as well as making a good case for bigfoot from convincing witnesses the drawings show how human many of the faces are. From memory only one image has facial hair (like the Patterson/Gimlin film) and this introduces the possibility of interbreeding between "pure" bigfoot and humans in past centuries. When attacked by other tribes it was common for people to disperse into the forest and also handicapped babies would commonly be left in the forest to die. So it's plausible that babies/children have been raised and then "intermarried". The human like features fitting with reports from hunters that the creature was too human like to shoot, murder being their concern. A further point is that all the Hoopa witnesses talk of a creature with no neck, but in the Patterson - Gimlin film "Patty" does turn her head.