The series is based on the marriage principles found in Gary Chapman's non-fiction book The Four Seasons of Marriage. Similar in tone and light-hearted, quirky humor as Jan Karon's Mitford series, Fannie Flagg's books or Steel Magnolias. Each book has a study guide that talks about the four seasons of marriage and the healing strategies depicted in that volume's story.
http://www.fourseasonsofmarriage.com/