 The same year his compilation CD "Cri du coeur", which includes lyrics from the works of Marguerite Duras, Aragon, Brecht, Pablo Neruda and other writers and poets, marked a departure from his usual entertainment-oriented style and gave him wide recognition among France's literati.He declared, in Paris Match magazine, that same year, he noticed former nazi officer, Klaus Barbie, had attended one his concerts in Bolivia, that helped arrest him to deport him to France for trial.In 2006, he wrote an autobiography "L'âme seule" followed a year later by "Le Bal des papillons", recounting in both books his experiences from humble origins to stardom and the relationship he developed with his mother after he found her.