Táto séria sleduje mladého chlapca, ktorý sa ocitne na nečakanom mieste a objaví v sebe skryté talenty. Čaká ho leto plné dobrodružstiev, kde sa stretne s tajomnou históriou a prastarou mystikou. Musí sa naučiť využiť svoje novoobjavené schopnosti, aby ochránil svet pred nebezpečenstvom. Je to pútavý príbeh o dospievaní, objavovaní seba samého a sile starovekých tradícií.
When Marco is dumped in Glastonbury to stay with his weird hippy grandparents for the summer, he's sure he's going to hate it. But he soon starts to recognise the magic of the place. With his mysterious new found talent for dowsing, Marco is quickly drawn into the dangerous struggle to protect the ancient mysticism of Glastonbury.
Glastonbury is a town steeped in mysticism, magic and religious cults. So when Marco's friend Rosa pulls a strange, rusted object out of the riverbank, the rumour starts to spread - the power of legends is back and the hunt for Excalibur is on. This book is Thom Madley's sequel to 'Marco's Pendulum'.