Maxwell's ride - M J Trow

It's a busman's holiday for Mad Max, saddled with two precocious nieces who insist he takes them to a theme park. While riding the White Water, a man is killed in the float ahead, and Maxwell and the girls become eyewitnesses to murder. The dead man is an accountant, working with CHARTS, a charity organisation sponsoring Leighford High School, where Maxwell works. With a local reporter, the indefatigable Head of Sixth delves into CHARTS and discovers a complex web of intrigue, murky secrets and financial chicanery. The corpses muliply as Maxwell nears the end of his search for truth - but will one of them be his own niece?