Paul and Jenn are caretaking the big old house, for his absent aunt. Among the stored Christmas decorations, they find a box of antique glass balls which react strangely to light. Despite Jenn's instant dislike of them, these unusual ornaments are used as part of their seasonal display and fascinate guests at a party. Then the balls start to disappear. Who wants to seize, study or destroy them? Why would weird societies send alien-alerts and the FBI show interest? What does the beautiful 'Mrs. Boss' know? Did the last words of Paul's long-gone mother refer to these mysterious orbs? And are they stealing love? In their search for answers, the young couple find themselves solving a family riddle, helping to right an old wrong and perhaps saving Mankind. Season's Greeting is fiction based on a real-life mystery and is the third novel in the Gathering Green series, bringing together characters from the first two books.