I wasn't talking about whether, or not, a hand can be seen in the image, but seeing as you want to ....
A subliminal image is intended to convey a message. What message does it convey?
That whole book is full of images that are a conscious and blatant effort to plant specific and recogniseable ideas in the mind of the reader, yet somehow, that gets overlooked in favor of some WT artist's doodle.