Is there a seventh Jesse Stone book?

No, there is no seventh Jesse Stone book written by Robert B. Parker. The series consists of six books, including:

1. A Catskill Eagle (1997)

2. Night Passage (1998)

3. Persepolis Station (1999)

4. Death in Paradise (2000)

5. Sunset (2001)

6. Stone Cold (2003)

Parker passed away in 2010, and while there are several Jesse Stone movies and TV series, there have not been any new books added to the series since his death.