The tide is coming in! How will Jack and Tim get out of the cave? In this fifth book of the Jack and Jenny Mysteries, the Carltons are back in Hong Kong visiting their friends, Tim and Ruth Chen. An afternoon of riding bikes once again turns into an adventure for the four friends. Finding a cave along the beach leads them to uncover an important archaeological discovery, a major drug-smuggling ring, and puts them all in danger. The dangers they encounter give them a wonderful opportunity to put into practice the Bible verses they have memorized. Anthony Bollback continues to thrill young readers in this next book of the Jack and Jenny Mysteries. He completely captures his readers' imaginations as they become enthralled with the Carlton's and Chen's adventures. At the same time, he weaves into the story the children's strong Christian faith and unwavering trust in God through trials and difficulties.