Blue Jeans is the pseudonym of Francisco de Paula Fernández who was born in Seville but lives in Madrid. He has moved on from being a publishing phenomenon to become an established brand, the biggest thing to ever happen to YA literature in Spanish. He is Planeta’s best-selling YA author with 1,2 million copies sold. His three first trilogies, Songs for Paula, The Club of the Misunderstood and Something as Simple as were romantic fiction, with his last trilogy, The Invisible Girl, he ventured into a new genre of great success: YA thriller. His novel The Camp is an hommage to Agatha Christie and her And Then There Were None and Chopin's Crimes is his last work.