Gaston Leroux' immortal story about the Phantom of the Opera has fascinated the world for more than a century. "The magic envelope", a hitherto unknown chapter from the original serialization of the story in the newspaper le Gaulois is here translated into Swedish with comments, extra background material and fan fiction by Lena Eskilsson. This book will shortly also be published in English. Gaston Leroux od dliga ber ttelse om Fantomen p Operan har fascinerat v rlden i ver hundra r. Ett tidigare ok nt kapitel, "Det magiska kuvertet" fr n publiceringen som f ljetong i dagstidningen le Gaulois har h r versatts till svenska av Lena Eskilsson, som ven bidrar med kommentarer, bakgrundsmaterial och fan fiction. Denna bok kommer att ges ut p engelska inom kort.