There are 4 books in the Smythe-Smith Quartet series.
The Smythe-Smith Quartet series does not have a new book coming out soon. The latest book, The Secrets of Sir Richard Kenworthy (Book 4), was published in February 2015.
The first book in the Smythe-Smith Quartet series, Just Like Heaven, was published in June 2011.
The Smythe-Smith Quartet series primarily falls into the Historical Romance genre.