Lucy holds her breath and tries with all her might not to move, not to make a random sound, not to give herself away. Something terrible is happening right before her eyes. Twelve-year-old Chiara flies with her father to Canada, where her grandfather lived - and bequeathed something valuable to her. But before she finds it, she has to unravel a tangle of mysteries. Grandfather, even in his nineties, was a great adventurer! Lucy meets Mike and Wilson, and together they experience the incredible summer of 1928 - full of events, fears, discoveries. Three schoolchildren are trying to prove that a crime really happened on the banks of the Otonabee River. And at the same time not to catch the eye of the killer... Getting to know the story from the depths of the last century, Chiara is getting closer to solving a long-standing family secret - how incredible life was many years ago!.. Detective, adventure, coming-of-age drama - several genres are combined in a bright novel Irish writer Brian Gallagher. History and modernity, the complexities of adult life and a child's vision of the world - he brilliantly combines all this in his books, full of details and memorable characters. Aimed at readers ages 12 and up, On the Edge of Otonabee will captivate and captivate readers of all ages.