The Railracing Angels
by Julie Day
Danny and Lizzie are now ready for their pair test. They have to stop two teenage boys from being killed by trams when one of them sticks to it with suckers wearing roller skates while the other races with it. With persuasion and transportation skills, they battle a new enemy before they pass. Owner, Jerry, tells them they went up against a 'Black Angel' and have to be alert now.