The Particle - Robi's Flying Saucer Series, #2

Saffron's life goes on as usual. She listens to her teachers and sometimes her mother. Mostly she works at Robi's flying saucer drive-in and hopes Clair Villeneuve will return. On a particular Sunday afternoon, Saffron accompanies her mother to Bonaventura high school bringing rotisserie chickens for the sisters' luncheon. Saffron notices a peculiar monk-like figure entering the basement of the school and she follows him.
The creature has brought with him, an ancient relic. He leaves it  with Sister Maris Stella but the old nun cannot hide it for long in the library. She devises a plan. Saffron must decide if she will help.