Well, the number of books in a novel series is not fixed. Some series wrap up quickly with just a couple of volumes, while others keep going and going. You'd have to look at the particular series you're interested in to know for sure.
The number of books in the Safehold series varies depending on how you count. Generally, it's around eight or nine. Different editions or compilations could affect the count.
One of the main themes is loyalty. The cats in the clans are very loyal to their clanmates and their clan. Another theme is survival. They have to fight for their territory, food, and safety.
There are seven books in the Harry Potter series:
Harry Potter and the Sorcerer's Stone
Harry Potter and the Chamber of Secrets
Harry Potter and the Prisoner of Azkaban
Harry Potter and the Goblet of Fire
Harry Potter and the Order of the Phoenix
Harry Potter and the Half-Blood Prince
Harry Potter and the Deathly Hallows
There were a total of five books in the Miaojiang Gu Series:
1 "Miao Jiang Gu General Guide"
"Miaojiang's Gu Affair (Part One): Legend of Gu People"
"Miaojiang's Legendary Venomous Insects: The Legend of the Ghost Venomous Insects"
4."The third part of the Miaojiang Gu incident: the symbiosis of humans and Gu."
5. The Poisonous Worms in Miaojiang: The Fourth Volume: The Poisonous Worms in the Barren City