Ghost in the Mirror (excerpt)

From Author Wars - https://authorwars.com/books/ghost-in-the-mirror-excerpt-2901382.html

Overview:

Title: Ghost in the Mirror (excerpt)
Author: R. L. Stine
Year: Unknown
Type: Short Fiction
Series: Goosebumps Series 2000

Variant Titles:

2007. Le fantôme du miroir (excerpt)