Milton Cheney opened the two Books of Magic in front of him.
These two types of magic were not attacking types of Zero Ring Magic, nor were they general auxiliary magic.
If one had to say, they were somewhat like magic created specifically for experiments.
The Parsing Technique being one of them can analyze the structure of objects. This type of magic had some overlaps with Milton's Spiritual Eye, but they were not the same.
The Spiritual Eye only allowed Milton to see the internal structure of an object, but it did not allow him to see the essence of an object.
At most, it had 'explanation', but no 'division', while the Parsing Technique was different.
The Zero Ring's Parsing Technique allowed Milton to directly see through the simple essence of some things.
For instance, a Book of Magic. If Milton had mastered the Parsing Technique, then he could directly parse this Book of Magic.