Trilogy
Decalogy
A series of 3 novels is called a trilogy. It is one thing that consists of three books,
The series of books is called the Chronicles of Narnia.
The answer for the question "What is a series of 3 books called?" The answer is trilogy.
A series of 10 books is commonly referred to as a decalogy.
13 books are in the series
a series of books about a fantasy land called Narnia. I have a copy of one of the series
A series consisting of 4 books is typically referred to as a "tetralogy."
3
A series.
it is called a series it should say what series it is on the cover or in the book
By analogy of the word "trilogy" for a series of 3 books, a single word for a series of 5 books would be a "pentalogy". This word is derived from the greek: 'penta' (meaning "five") and '-logy' (from "logia" - for which one meaning is "a collection of words").