Reginald Philpott Introduces Us to "April Darling"

Retired before his time, Reginald Philpott was searching for an idea for what he could do with his life.  An idea flew past him.  You can use a computer.  Write a movie.  But what?  Then a small blurb in the newspaper set off his imagination:  Man goes missing and returns as a woman.  The result is a novel with the feel of a James Bond thriller, although in this case it's a Jane Bond thriller.