Flambards Quartet by K M Peyton

The Flambards trilogy by Kathleen Wendy Peyton is a series of historical novels that follows the life of Christina Parsons, an orphan who navigates the complexities of family dynamics, societal expectations, and personal growth in Edwardian England. The narrative begins with Christina's arrival at Flambards, her unkempt new home ruled by her strict Uncle Russell and inhabited by her cousins Mark and William.

Throughout the series of books, Christina grapples with conflicting loyalties between the traditional values upheld by Mark and the progressive aspirations embodied by William, particularly in the context of the changing world around them.