"I would like to know how many cities are mentioned in the books, if it pleases you a list would be greatly appreciated, however a number so I know how many to look for works as well."
Certainly you read the instructions before submitting this request. However
it is possible that you didn't understand them. So I will tell you again.
What I won't do:
I will not furnish 'every instance' of a common phrase or group of words.
Such as:
"I need every instance where a tarn is mentioned."
"How many times does the series show a slave dropping to her knees?"
I will not answer open ended broad questions. Even if including specific
words such as:
"What are a slave's duties?"
I will not answer generic type questions such as:
"Are most slaves blonde?"
Your question of "How many cites are mentioned in the books?" certainly
falls within the 'every instance', 'open ended broad' and 'generic'
guidelines of a question I have no time to answer.