This is a companion novella to the Westcott series, coming between books 6 and 7, so it should really be numbered 6.5, not 7. If someone at PBS can figure out how to list this correctly, it would probably be most helpful to all readers of the series.
It is very confusing to see two different books labeled as Book 7.
It is very confusing to see two different books labeled as Book 7.