"For those who are looking for novels like the Human Envelope, I can recommend the following two novels: Doomsday Envelope and Forbidden Zone Secret Files. The former told the story of an ordinary college student who was forced to embark on the road to survival after receiving a strange package. The latter was a deliveryman who received a mysterious package and began a nightmare journey. Both novels had exciting plots and thrilling plots, which were very suitable for heavy novels. I hope you like my recommendation. Muah ~