Young detectives
In this second book we're in Daisy Well's family home, Fallingford, for the holidays. Hazel wong and two other of their classmates are also there to celebrate Daisy's birthday. When one of the guests, who has proven themselves generally unpopular dies from poisoning Daisy and Hazel get caught up on the investigation.
It's very much a Country House mystery, with bonus isolation due to a rain storm flooding access and the girls have to use their smarts to investigate. They don't like some of the conclusions they have to come too but they do try to be as neutral as possible.
It's a good read with some great characters and it all falls together well.
Using it for the Country House Square and it would be perfectly viable for the Baker Street Irregulars as well.