Mephisto's Plots, continues the Children of the Diadems Series: Mephisto is no ordinary creature, who or what is he? Children suddenly vanish from an empty swimming pool, and two pets trapped on a tree in Carl's back garden, are in danger from menacing birdlike creatures called crowbates. Carl's friends and other bystanders become petrified, when a shadowy fiend transforms into a fierce, fiery, bolder spitting dragon in the air, and the terror intensifies when gargoyle looking underworld creatures, push their way up through huge cracks in the ground... Can anyone save them? All that and more in this miraculous, magical adventure story, which continues to cleverly weave its plots between family and school life.