Here's a breakdown of what makes them series:
* Shared Universe: The most defining element is a shared world or setting. Events in one book often impact the others.
* Recurring Characters: Main characters reappear across multiple books, often evolving and changing throughout the series.
* Overarching Plot: While each book may have its own individual plot, they contribute to a larger, overall story that unfolds across the series. This overarching plot might be revealed gradually or be the central focus of the series.
* Sequential Publication: While not always strictly sequential, the books are generally published in an order intended to be read in that order for the best experience of the narrative.
Examples include:
* Harry Potter: Shares a common setting (Hogwarts), characters (Harry, Ron, Hermione), and an overarching plot (Harry's battle against Voldemort).
* A Song of Ice and Fire: A complex world with many interconnected storylines and characters.
* The Lord of the Rings: A single, connected narrative split across three books.
The key distinction from standalone novels is the intentional connection between the books, creating a cohesive and expanding narrative experience.