Knowledge area vs Process groups

All of the books I've thumbed thru are organized by Knowledge areas.  I find that I get Executing mixed up with M&C.  Therefore I am thinking of studying by going thru the knowledge area.  Would you say that's a good idea?

 

For Initiating I am going to study develop Project Charter and stakeholder Anaylsis.  I know I have to know this anyway but I am thinking it might help me to understand the processess a little better.  What are your thoughts?