The Hungry, Hungry Soul-Sucking Death Worm is a demonic book seen in "Dead at Eight". Mordecai and Rigby are ordered to read The Hungry, Hungry Soul-Sucking Death Worm to Thomas. It is about a Soul-Sucking Death Worm. The book includes many tabs, and the last 4 tabs at the end of the book releases the actual Soul-Sucking Death Worm if pulled all at once. It's an obvious parody of the children's book: "Hungry, Hungry Caterpillar."
It is a brown, think book with scratches, most likely demonic signs or symbols, on the front of the book. On the binded area, there is a yellow, boney bind.