So it seems sometimes people may understand their emotional response isn't rational such as with irrational fears, where they know being scared of balloons makes no sense but that knowledge doesnt effect their sub conscious.

Just as with Pavlov's dogs may have know it's silly to dribble when he rings the bell but they keep doing it. Is there a book that will go into how we create new fears on a evolutionary psychology basis or neuroscience basis, so I want to know the neuroscience behind how the concept of balloons could get connected with emotional part of our brains that makes you feel scared of them.

Also how ever you get Pavlov's dogs to stop dribbling, is that the same methods to disconnect the concept of balloons from the emotional part