noun. A literary or artistic work consisting of four parts; a series or group of four related works; a tetralogy.

Is there such a word as quadrilogy?

A tetralogy (from Greek τετρα- tetra-, "four" and -λογία -logia, "discourse"), also known as a quartet or quadrilogy, is a compound work that is made up of four distinct works.

What is a Perogus?

1 : dugout sense 1. 2 : a boat like a canoe.