The greedy gremlin

"Sprite and Violet are planning to tackle a particularly large pixie when their attention is diverted to the gremlin Jolt who likes to mess with electrical things, and who has trapped Violet's cousin, Leon, inside a video game; and it is up to the two of them to get Leon, and themselves, out of the game, and Jolt back where he belongs--if they can survive the infamous level eleven"--OCLC.