Fresh from co-writing the brilliant Adventures on Trains series with M. G. Leonard, Sam Sedgman has created an ingenious new adventure for children that follows aspiring inventor, Isaac Turner, across London landmarks on the trail for clues to his father’s disappearance. We spoke with Sam about how a visit to Big Ben with his own father proved to be all the inspiration he needed to create this new series, why he finds the real world so much more fascinating than fantasy and where Isaac’s adventured may take him next.