Have to say, it reads fast and pleasant. You will not regret getting this book if you decide to do so. I withheld two stars because book claims to be historical, while there are quite a few inaccuracies.
I respect the admiration author has for Caucasian mountaineers (being descendent of such it is especially pleasant), but she definitely overromanticizes her hero(s). Shamyl is great enough figure and Chechens are brave enough people to be in need of overglorification.
Book tells a lot of legends and passes them as facts. Some most naïve, even silly XIX c stereotypes are restated without questioning - i.e. Khevsurs being descendents of Crusaders who passed through Caucasus in their due time!!! This lame assumption is based on the fact of cross being important symbol among Khevsurs (who in fact are Georgian mountaineers, just like Svans (Suanetians) who Blanch "mistakes" for Muslim North Caucasians (in fact they are Christian). Khevsur cross is pre-Christian symbol (sufficient archeological evidence for anyone who cares to check).
Blanch also retells number of legends told by Alexander Dumas in his "Adventures in the Caucasus" (without referring to the source!) And names some of those legends (I remember two: Shete, child-tongue cutter; and a father who cut up his son's dead body into 70 pieces and sent to his relatives as a request for revenge...) as "Chechen stories", while Dumas tells them as Tushetian ones (another Georgian Christian tribe).
Either she is mistaken, or she purposefully mislocates the origin of characters in order to draw a portrait of Chechens the way she wants. It is OK to be mistaken and I hope it is just a mistake, because I really don't like when writer misleads the reader...
There is not much research done and there are very few books written about Caucasian history in any language. Despite what I said above, this one is probably the best among English books I have come across. So, I recommend it to everyone, especially if you are not a history buff, but a sucker for good romantic story about bravery and glory and freedom, etc. We may say, story is "based on true story". Enjoy it!