The Simpsons Treehouse of Horror Ominous Omnibus Vol. 1: Scary Tales & Scarier Tentacles is the first of three volumes collecting the complete comic series by creator Matt Groening, packaged in a deluxe, die-cut slipcase that glows in the dark. Collected for the first time in a deluxe hardcover slipcase with an all-new die-cut cover, these award-winning comics place the world's most beloved animated family in exciting horror, science fiction, and supernatural settings, making this series the perfect gift for the Halloween season and Simpsons fans of all ages. The Treehouse of Horror started as an annual Halloween tradition on The Simpsons, beginning during the second season in 1990.