It is a very extensive book, focused narrowly of the relationship of tolstoy to the Canadian doukhobors with much detail about it, and even several appendices full of translations of the original letters.
I paradoxically i feel i did not learn very much about either tolstoy or the doukhobors as there was no true general overview, but rather almost immediately a deep dive into the specifics. Anything general i learned about either was mostly tangential, and many of the more notable events were not covered or even intentionally omitted.
It did have a few introductions to the Doukhobor creed as written by Verigen and indicate some influence from Tolstoy.
It is what it set out to do, and certainly can be worth archiving, though the utility of it seems to me to be not very much beyond perhaps historical grounding in the time place and relationship that is covered.