Secret key

Agatha knew all her life: she was a born detective. But for some reason, those around him were in no hurry to believe her, and the right business has not yet come across. But once everything has changed. This happened on the day when Agatha became a random witness of a real crime. The attacker made his way to the Hyde Park on a motorcycle and shot down a professor at the Royal Geographical Society. In addition, London was shocked by a disaster: poisonous red algae filled rivers and canals. And only Agatha knows that these two incidents are connected with each other. True, she still does not suspect that her family is related to these mysterious affairs ...
The first book in the series.
For secondary school age