There are 3 books in The Casebook of Dr. McKenzie series.
The Casebook of Dr. McKenzie series does not have a new book coming out soon. The latest book, The Case of the Ill-Gotten Goat (Book 3), was published in June 2008.
The first book in The Casebook of Dr. McKenzie series, The Case of the Roasted Onion, was published in September 2006.
The Casebook of Dr. McKenzie series primarily falls into the Amateur Sleuth genre.