"A Fine Passion" by Stephanie Laurens

Baron Jack Warnefleet has finally ended his career as a spy for England and wants nothing more than to return to his country estate in Avening and a quiet life.  In the years that he's been gone, Lady Clarice Altwood has moved to Avening to live with her bachelor cousin after having been exiled by her father and the ton from London.  Jack and Clarice meet while tending to an injured stranger who sends them back to London to confront her family, the ton, and the Bishop of London in order to save her cousin.

I enjoyed this very well written book.  Clarice and Jack are both strong and capable people who are immediately attracted to each other but are wary of marriage and commitment.  The intrigue with her cousin put the focus of the novel on Clarice's family and her place in it but didn't detract from the romance.  This is part of Laurens' Bastion Club Series, and I'm tempted to read more.  437 pages.