Originally Posted by BelleZora
Michael Connelly's series have been successful with no diminishing quality. I think part of that success has been the characters who pop up each in other's series. It's fascinating to see Harry Bosch appear in a novel mostly about Mickey Haller or Terry McCaleb. Connelly has created a rich and stark world where we see each beloved series protagonist through the eyes of other leading characters.
Jeffrey Deaver is another author who does that. Characters who are the protagonist in one series of novels show up as minor characters in others. As you say, it adds to the "richness" of the fictional world. I've never read a novel by Deaver that I haven't thoroughly enjoyed.