This piece of art was found on page 35 of the book "The Knowledge that Leads to Eternal Life."

If we place a mirror in the lower left edge (where the child is sitting) we get this picture:

Here you are another satanic mirroring image. To get this demonic image you must place the mirror next to the face of Jesus. This creepy mirroring image is related to spiritualism.

The following picture was published in the “Awake!” magazine, issue August 2009 (page 23).

The same picture is on page 39 of the book "Learn From the Great Teacher."The painting depicts the episode in which Jesus washed the feet of his disciples:

To reveal the hidden mirroring image you have to place the mirror next to the face of the apostle sitting in front of Jesus.

This image represents a demon known (in witchcraft and sorcery) as Belphegor :

The following image is in chapter 88 of the book "The Greatest Man Who Ever Lived" .

It represents the “rich man” (in the parable "The Rich Man and Lazarus“) after his death in the Hades.

To decode the encrypted mirroring image simply turn the picture 90° and then place a mirror on the edge:

Now, look at the complete mirroring image: