A review by yapha
The Forbidden Stone by Tony Abbott

4.0

Just before Uncle Henry dies in a mysterious accident, he sends Wade's father a coded email. Wade, his step-brother Darrell, his cousin Lily and her friend Becca set off to Berlin with Wade's father for Uncle Henry's funeral. While there, they encounter sinister strangers and more clues leading them into the world of Copernicus's secret discoveries. An exciting mix of science and adventure, recommended for grades 5-8.