Fernando Pessoa (1888-1935) is a Portuguese writer and poet. During his lifetime he regularly published in Portuguese literary magazines and created one of them, the famous Orpheu. When he died, 27,543 texts were discovered buried in a trunk that was gradually exhumed. The mythical and posthumous book is “The Book of Intranquility”. Pessoa created a multiple and complex poetic work under different heteronyms in addition to his own name.