There are 5 books in the John Thinnes & Dr. Jack Caleb series.
The John Thinnes & Dr. Jack Caleb series does not have a new book coming out soon. The latest book, White Tiger (Book 5), was published in August 2005.
The first book in the John Thinnes & Dr. Jack Caleb series, The Man Who Understood Cats, was published in June 1993.
The John Thinnes & Dr. Jack Caleb series primarily falls into the Law Enforcement genre.