Hello,
thanks for trying out the new riddles so fast!
You almost solved it, but its not yet the solution. Do you want a hint or keep trying?
We will make this more clear in our next update, as many didnt seem to find the connection there.
In the shelf with the books there is a picture on the wall which shows different medical items of different height. You must adjust the books with the right topic on that height and then put the symbols in order of the items on the picture from top to down at the safe.
