If you stop at the story, you’ll already have had value for money. If you decide to read the rest of the book as well, you’ll come away not only wiser, but also irresistibly entertained. It’s packed with gems: historical details about slaughtering methods, the use of the lasso, and, more worryingly, the mazorca (you’ll have to read the glossary to find out why this should be worrying, but Edward II might provide a hint), the practice known as the slippery dance, the other, less musical meaning of the violin y violon; and, underlying all this, the tragic oppression of one faction by another, in a Swiftian parody of political schism and reversal that, as these things tend to do, resulted in the deaths and torture of thousands. On top of this, you’ll have contemporary accounts of butchery in Buenos Aires by the famous, such as Darwin, and other less well-known travellers, such as a certain Major Alexander Gillespie, according to whom “negroes [...] have generally a predilection for food very salt, and even tainted”.
The book as a whole, in other words, not only introduces and contextualises one of South America's greatest stories, but delights on its own terms. I recommend it.