ScreamMachinesDunn[Book: Karen Lewit Dunn – 2006 – 17x22cm – 24 Pages – Full colour]. A light read for those budding roller coaster designers of tomorrow. Explores scientific terms such as: kinetic energy, potential energy, friction and gravity. Chapter Points: Roller Coasters; How Roller Coasters Work; Two Types of Roller Coasters; The Best Seat; Index. ANDY SHINE’S RATING: Good for children.