I bought the kindle version of book and read it very intensively. It was
a great & comprehensive historical account of the events in January-May 1959 in the
Dyatlov search and investigation operation.
As a mathematician myself, it was interesting to see that the book
introduced "overdetermined systems". In the section
"Dyatlov Pass for Dummies", we have that an
"overdetermined system is almost always inconsistent, it has no solution."
After reading several books and articles about the incident, I had
come to my own belief that the evidence is inconsistent. In mathematical
logic, Gödel's completeness theorem says that any consistent list of
statements ("evidence") has a model, or a "solution".
After 60 years there are all these theories but they all seem to be only
partially convincing. Why is that? My guess is that the evidence is
inconsistent. It has no model.
One the authors suggests that by breaking up inappropriate
connections (assumptions) in the evidence, the system may become consistent and have a solution (or in
the logical setting, by removing inconsistencies from the list of evidence
it may have a model).
The authors present a model that explains the extensive injuries on three
of the Dyatlov group members in a new and most natural way (tree falling
on the tent). This model becomes possible when some of the evidence, for
example the footprints leading down the hill, is re-evaluated as belonging
to a staging, not to the event itself.
Of course, their solution is dependent on the assumption that the "last photo"
(loose photos # 12 on the site) - thought to show the location of the tent
being prepared on Feb 1st - is not authentic or last. However, in this case the
coverup has to be even deeper than described in the book: This photo
shares an important detail with the famous tent picture of the Slobtsov
group finding the tent on Feb 26th. There is a ski pole looking object at similar
position with respect to the tent (photo #12 and the Slobtsov photo being
taken from opposite sides wrt tent). A coverup would have to have 1) developed
the films before Feb 26th, 2) removed any photos after #12 3) staged the scene
carefully with respect to the detail in the photo OR they would have needed to
fabricate photo #12.