#2 in the Jack and Jenny Mystery series, the Carltons head to Hong Kong again on another business trip. Memories of their involvement with smugglers during their last visit are still vivid in their minds, and Jack and Jenny are anxious for another adventure with their Chinese friends, Ruth and Tim Chen. The parents assure them that such an encounter was once in a lifetime experience and isn't likely to happen again, but the four inquisitive children secretly hope for another adventure. Sure enough, they soon find themselves captives on the Twin Dragon at the mercy of dangerous criminals who pulled off the ingenious armored car robbery. Recommended for ages 8 to 12 years.