Lorenzo Silva's new novel, Púa, is about a former police officer infiltrated into a terrorist organization. Silva: "The person who tortures, humiliates and murders and thinks he is doing what he should do is the one who piques my interest" "I have no interest in talking to one of these ETA members come out and the trials because they are people who clearly have a broken moral structure," he says.

"What we do as a country with the certainty that there was a dirty war in our name?" asks Silva.