When Nancy, Bess, George, and classmate Phoebe Archer team up to write a mystery for class assignment, they decide to write about the ghost of Carl Sandburg. Each member of the team must write a section in a special notebook. But when it's Phoebe's turn to write the ending, the notebook disappears from her book bag. An illustration per chapter.
What do You think about The Make-Believe Mystery (2000)?