Tetralogy
compound work that is made up of four distinct works
The Adventures of the Master
The Hunger Games
The Matrix series
Caster Chronicles
Flatfoot
Der Ring des Nibelungen
Airport
The Raven Cycle
The Allegory of Love
Tales of the Four Seasons tetralogy
Monster tetralogy
Rainbow Troops
Psycho tetralogy
Black Cobra
4 Horror Tales tetralogy
The Four Seasons
The Grail Quest
The Starbuck Chronicles
The Sea of Fertility