This just didn't read like a Chalet book to me. I have read other fill-ins and enjoyed them and forgotten that it wasn't EBD writing but this one just never achieved that moment.
The theory was nice - cover Cornelia's romance and expand her character a little. It was odd to cover the journey so comprehensively though - EBD's characters tend to just arrive not travel. Then the bits of history carefully inserted (Stonehenge, American Civil War, Diamond trade) seemed very dull and the concentration camp sections far too graphic.
The grammar was also poor with not enough commas and no sign of semi colon and there were spelling mistakes. It needed proof reading and serious editing. ( )

Poorly written with ridiculously out of character moments throughout. ( )

Easily best fill-in so far ( )

Excellently written fill-in, best one so far. Believable characterisation and in keeping with original series. Loved it. ( )