Dean Koontz’s books on Jane Hawk and Lee Child’s books on Jack Reacher are examples of suspense thrillers that have done well as a series. Many of these are included in the regular review section.
I have gotten to know the Jack Reacher character by Lee Child and look forward to the next book. I was a little disappointed to find that Jane Hawk had not really let us know if her little boy was ok at the end of The Crooked Staircase. It does bother me that Jack Reacher seems to really care for some of the women he gets close to and then he just leaves, or they do.
I still see Stephen King and the real master of suspense thrillers, horror, fantasy, science fiction, and mystery. He does well without having the characters as part of a series.
Books in a series perhaps could include a “Series of similiar approaches such as below
Lisa Genova has written five very good books, Still Alice, Left Neglected, Love Anthony, Inside the O’Briens, and Every Note Played. Each of her novels are about people who have heartbreaking diseases and she brings her own background as a Neuroscientists to the stories that bring a compassionate look at these lives.