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A frantic rooftop race.Alchemy lessons on a zeppelin.A booby-trapped pyramid . . .Just the start of semester two at Prometheus High.Athena and Marceline are on a mission to unearth Marceline's past - if their foolhardy plans don't get them expelled or killed.Godfrey's lonely without his friends, so when Emily needs a favour he's eager to help. But is her request all that it seems?Meanwhile, on the airship Atet, an ancient monster of unsurpassed power and fury is about to awaken . . .