In another fast-paced but routine mystery from a prolific author, two boys try desperately to find out what has happened to their vanished mother. Rick, 11, and Kenny, 7, are just beginning to cope with their parents' separation when their mother disappears moments after they see her talking to someone in a big black car. The police are polite but unconcerned; unable to reach their father, a tracker, file boys go to stay with Uncle Henry in an RV park near an abandoned amusement park. There, they meet Conrad, who encourages Rick to try to find his mother on his own. It develops that the mother has information that puts the entire family in danger from a hijacking ring involved with insurance fraud. Despite rudimentary characterization and pedestrian dialogue, the story does move quickly to a satisfying climax, skillfully involving the amusement park. Rick's narration is flat but believable; the tempo holds up to the end.