Shadows on the Farm

Ombre Sulla Fattoria (Shadows On The Farm) is an Italian children's book by Cristina Brambilla in the "Misteri A 4 Zampe" series.

Premise
On the farm of Fred's uncle, at the annual apple harvest, a giant raven terrorizes everyone present. Maybe someone wants to sabotage the new sweet variety of apple that Fred's uncle created, which is already selling like hotcakes?