Summer to Remember / Mary Balogh 371 p.

In this first in the Bedwyn saga, Miss Lauren Edgeworth agrees to pose as Kit Butler's fiance so that each may gain their independence.  She's to have a most memorable summer before she breaks the engagement and is deemed unmariageable; and, he to avoid being trapped into an arranged marriage.  But Kit does the unplanned and falls in love and works to convince her to stay with him.