Well, Goosebumps WAS the book series you're thinking off...brandon237 said:I know I have read this...Leemaster777 said:Oh, I know, I know! Behind the door, is a mirror and a lightbulb.
If you turn on the light, you'll turn invisible until you turn it off.
But don't use it, if you do, you'll get sucked into the mirror and be replaced by an evil doppleganger!
(Whoever gets this wins seven internet cookies)
Due to the nature of the post, I cannot Google image this... but is it by any chance one of those stories that came in small books for children? The ones that were creepy but that you could give to children... I forgot the name, but there were hundreds of those stories[footnote]I remember ones about time travel, clones, getting stuck with ghosts, creepy musicians, screwed up Super-hero stories...[/footnote]. Damn memory loss...
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Goosebumps? Was that the story set?
...but that wasn't where this came from. You're on the right track, however.
Here's a hint. Same basic time frame, same target audience, but different medium.