ヘスス・ヒル=ビルダは1971年サラゴサに生まれた。当地で化学の学士号を取得したあと、プロセスエンジニアおよび販売部長として企業に勤務。現在はバルセロナ在住で、映画の脚本家として、モントリオール国際映画祭やカタルーニャ映画アカデミーのガウディ賞など、さまざまな賞を獲得している。Crisis de gran mal（最悪の危機）はヒル=ビルダ初めての小説。

Jesús Gil Vilda was born in 1971 in Zaragoza, where he later graduated with a degree in chemistry. Since then he has worked in industry as a process engineer and marketing manager. He currently lives in Barcelona.

Jesús García studied Business Science at CUNEFF (Madrid) and is a certified life coach, mentor, change facilitator and transpersonal therapist.

Jesús Díez de Palma (Madrid, 1962) studied art history and was a teacher for some years, and currently works as an environmental educator in Madrid’s Retiro Park.