'As the ship carrying nine-year-old Cleary Sullivan and his mother, Cate, sets sail from Liverpool, there is a ‘flurry’ among the passengers. A ‘violent slash of red; tall as a house and shining wet’ has appeared on the dock, visible only to those onboard. Cleary’s mind fills with images of ‘some diabolical creature of the deep, blood erupting from its mouth’. The reality is more prosaic – some spilt paint – but it is an ominous beginning.' (Introduction)