Book 4: Harisha and the Secret Circles
*Sequel

Harisha joins his grandfather Alexander Adams on a special trip-mission to an archaeological site in Bulgaria. A stella is excavated and the symbol on it is exactly the same as the third symbol on the ancient map Harisha has found in Rajasthan. The mystery even thickens after the stella is stolen during the night from the archaeological camp. Harisha has a new friend - a little raven. The bird is the one who finds the thieves and helps the boy to solve the riddle with the symbol of circles, which appears also in the crop fields. A pilot, old friend of Alexander Adams will help with that mystery, but more questions arise.
To be continued...