A series.
One is called "Totally Preggers: An Expecting Mothers Tale" and the other is called, "Baby Incoming: Preparing With Vigilance."
A group of humans is called a group, crowd or assembly.
Bibliology is the study of books.
WHAT IS A GROUP OF ATHLETES CALLED
A group of books is typically called a library or a collection of books.
A big group of books is called a library.I call a group of books a group of books.
A libraryA book group
A library.
A series.
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A set of 3 books or movies is typically referred to as a trilogy.
There is no group called the Illuminati. It is made up for fiction and a books.
one, 3 x 3 = 9
Trilogy
The extra group of books are called the Apocrypha or deuterocanonical by Catholics. These "extra" Old Testament books include Tobit, Judith, Maccabees, Sirach, and several others.
A group of 3 cows would be called a "herd of cows". It is a very small herd, but it is technically a herd. Anytime you have a group of cattle it is called a herd.