The House by the River - Faith Finders by Maary Weeks Millard and published by Day One Publications.
Following their mum’s sudden illness, three children are sent to stay with their great-aunt for the summer holidays.
They are upset and worried about their mum, and they hardly know their elderly great-aunt.
As her old house begins to give up its secrets, the children engage in a treasure hunt—one which will change all their lives for ever.