Even after retirement, there is only so much golf one can play, only so many hands of bridge one can deal. In addition, many older people desire to earn a bit of extra money, but don't wish to flip burgers or sell Amway. This book helps them develop writing skills, based on job, hobby, career, or parenting experiences. By writing and selling their work, older people will keep their minds active, make some extra money, and stay current with a field of interest. They will live longer and better.
PEs come from all walks of life.
They were professionals. They worked in services. They were in sales. Teachers, civil servants, factory workers, clerks, as well as the millions who worked in volunteer positions, are all PEs. It's a skill all of them have developed.