Felt unsettled by this story

Whilst reading The Jaunt A giant unease crept over me like a malaise Unable to shake it off I had to venture forward Yet every step bought forth unsettling dread creeping through my bones As I approach the last page I wanted to go back but fate tells me otherwise How can a sci fi story scare me so? As I finish the story a wide eyed horror begin to fill my whole face What was once a face full of youthful vigour now filled with aged and wrinkled horror