I thought it could be related to Philosophy of Mind but it is fundamentally about bilology and neuroscience.

I thought it would be more about phylosophy but it was purely neurobiology and neuroscience, how parts of our body and chemicals interact in particular to generate emotions and the concept of self.

The author starts with patients who have suffered accidents and lost part of their prefrontal cortex, so that they cannot experience emotions. These people struggle in decision making and the whole argument is about somatic markers of emotions and how emotions are useful to decision making. Cold rationality is not better.