For readers that love exciting action-packed adventure stories and films, FloodWorld is perfect. It is full of tense cliffhangers, thrilling chase scenes and hairbreadth escapes as two children, Kara and Joe, fight to confound a ruthless pirate plot. Imagine London in the future, when rising sea levels have submerged half of the city. Privileged citizens live in the central zone, protected by a huge wall. Meanwhile the less fortunate scrape a living in The Shanties, a squalid area of flooded tower blocks and rickety boardwalks. In this fractured world, the only thing that unites the inhabitants from inside and outside the wall is their fear of a different race: The Mariners…