One Day You'll Know (Heartland #6)

Amy's grandfather has been hospitalized with a case of pneumonia, and her sister, Lou, has left for England on a mission to track down their estranged father. Independent as ever, Amy takes on the responsibility of maintaining Heartland with her usual dedication. But as the hours and stress begin to wear on her, she realizes she can't deal with it all alone. This is book number six in the HEARTLAND series.