I read this book during a hot summer in Russia; it was curious to think that 'Let Our Fame Be Great' is set in the same country. I'd recommend it, with the following points:
1) The book focusses on the North Caucasus, so don't expect coverage of Georgia, Armenia or Azerbaijan.
2) It takes a surprising (though welcome) turn in the last section, changing from a historical perspective, to reporting on events from the last decade. Overall, the book is a rich blend of history, reporting, with travel writing and folklore. The few pages of colour photographs add to the account, evoking the people and places that Bullough encounters.
3) It's not a complete, 'academic' account of the region - it's more like a colourful taster, leaving you wanting to read more about the Caucasus. That is the secret of this book's charm.