Justus, Peter, and Bob are best friends and detectives! Together, the three ??? have solved many tricky cases. The three ??? Kids help Uncle Titus clear out a kind of haunted castle. Suddenly, the friends find themselves in the middle of a new case involving old knights and valuable diamonds. Learning to read is hard? Not with this exciting story, which even beginner readers from grade 2 can easily handle. Illustrations and a reading puzzle at the end of each chapter make the book varied, provide a sense of achievement, and boost reading motivation. This makes the transition to independent reading enjoyable.