I think that's true of real life - we don't ever know anyone completely. Secrets are very important to creating a narrative work that's believable. The characters come into that world with secrets, as happens to all of us. As honest as we try to be in our relationships, we can never completely know someone. From a narrative perspective it's very important and pleasing - you want to have those secrets there. The secret is an essential part of the creation of the novel.

There were many books in my parents' home. I'm from a family of five children and we were all readers. And so by the time I left home, I had already read many books, and I was very interested in reading more. That was when I started to have the desire to write. But it wasn't like a divine apparition with angels and seraphins on high. Not for me, at least.

I read a lot of poetry. All types of poetry, but mostly Catalan poetry, because I believe poetry is the essence of language. Reading the classics, be they medieval or contemporary, gives me a stylistic energy that I'm very interested in.

Along the way, about certain things, you realize, "I don't know anything about this." You think, "Is this going to sound ridiculous?" So I pestered more than a hundred different people over the course of the book. And when I finished the book I gave it to six or seven trusted readers, who are always the same, but I also gave it to a brother of mine who's a doctor and I asked him to read it, and he was very helpful. It's good to have a group of trusted readers. As my kids have grown up, they've joined this group.

Each year, in this world, several languages do die out. There are certain languages that have their survival assured for many years, such as English, but there are other languages whose survival is not so sure, such as Catalan, especially if they don't have a state that protects them. Catalan is spoken in Catalonia, Valencia, the Balearic Islands, and Andorra. There are about ten million people who understand it and eight and a half who can speak it. But its future is much less certain than, for example, Danish or Slovenian or Latvian, because they have a state.

I take all my characters very seriously - the main, secondary, and supporting characters. Even if they only appear once, they still need to have their own life. Some characters are absent literally but at the same time very, very present.

For someone like you who's a British citizen this might seem strange. How can you ban a language? It turns out that you can. During the dictatorship it was illegal to speak Catalan. This is an experience that we Catalans have all had to varying extents. Some more tense than others, but it's something we all share.