Hunted Along the Rhine is the sixth book in a highly addicting series in which three teenagers have the opportunity to travel the world (they're in Germany in this book). The only catch? They're always chased by Hoffman, a villain who'll stop at nothing to capture the three teens to stop them from foiling his plans to be rich! The adventures will keep you on the edge of your seat. They keep coming, but they're fresh and new in every book!