It's a semi-autobiographical account of events he witnesses as a journalist during the tragic events occurring in the Balkans in the early 1990s.
El horror puede vivirse o ser mostrado, pero no
puede comunicarse jamás. La gente cree que el colmo de la guerra son los muertos, las tripas y la sangre. Pero el horror es algo tan simple como la mirada de un niño, o el vacío en la expresión de un soldado al que van a fusilar. O los ojos de un perro abandonado y solo que te sigue cojeando entre las ruinas, con la pata rota de un balazo, y al que dejas atrás caminando deprisa, avergonzado, porque no tienes valor para pegarle un tiro.
Because it's short and episodic, it's a book we recommend if you're learning Spanish. You want to read, lots, but pick the shorter books if you can 😉 ! The sense of achievement in finishing a book in another language is great, and means that you're more likely to pick up another, which you want to do.
Here's a fascinating video (51m) in which the author talks about the book and his experiences:
Here at IH Barcelona, we have a lending library where you can take out books and DVDs (including Alatriste, based on a novel by the same author) while you're here.
Get yourself as much extensive reading and listening practice as you possibly can: it's such a great way to improve your Spanish!
Also by Arturo Pérez-Reverte
La tabla de Flandes