Let's Get Invisible! is the 6th book in the original Goosebumps series.
The original cover illustration features Max Thompson looking through a mirror in the attic. Half his body is invisible.
The Classic Goosebumps cover illustration features Max whose head has vanished under the light of the mirror.
Synopsis[]
On Max's birthday, he finds a sort of magic mirror in the attic. It can make him become invisible. So Max and his friends start playing now you see me, now you don't. Until Max realizes that he's losing control. Staying invisible a little too long. Having a harder time coming back. Getting invisible is turning into a very dangerous game. The next time Max gets invisible, will it be... forever?