There are 2 books in the Clare Brother and Sister series.
The Clare Brother and Sister series does not have a new book coming out soon. The latest book, Impoverished Miss, Convenient Wife (Book 2), was published in January 2011.
The first book in the Clare Brother and Sister series, A Question of Impropriety, was published in December 2010.
The Clare Brother and Sister series primarily falls into the Historical Category Romance genre.