Iván Repila (Bilbao 1978) is a writer, editor and cultural commentator. He has worked for diverse organisations as well as national and international institutions in the production, coordination and management of conferences, meetings and festivals of theatre, music and dance.

Iván Solbes is an Illustrator by vocation and, for twenty years, also by profession. He does many very different things and tries to make sure they all turn out well. What he likes best is to think up new ideas and draw them.

J. Á. González Sainz was born in Soria (1956) and has lived in cities such as Barcelona (where he graduated in Philology), Madrid, Padua and, above all, Venice and Trieste.

J. Black River (Sabadell, 1988) has a degree in philosophy and an addiction to cheeseburgers. He grew up with the wolves until a witch taught him to read, and has since been a farmer, a nanny, and the captain of a publishers. He likes to look at the moon and give guitar concerts for animals.

J. Olloqui is the old guy who wrote this book. He's over 30. He loves popular literature, the cinema, comics, and pop music - and that's why he's always in a bad mood. Although he took up writing at an early age, when he was a teenager, he took a detour from the world of letters to discover pop.

Born in Madrid in 1978, he studied Business Management at Seville University and since then has been linked to the financial sector, specialising in private banking and personalised advice.

Jacobo Bergareche (London, 1976) combines his writing with his work as a producer and script-writer of fiction series.