I am writing stories to a publisher.
Without a more detailed description of your purpose, how do you expect a decent answer?
I am writing stories to a publisher.
Frankly, this is not a description of a Writer procedure. If this is the problem itself, we can do nothing for you. Read these guidelines and edit your question to improve it.
Do you mean you want to send only a selection of pages within a document?
If you want to send them as an PDF
File → Export As ... → Export As PDF ...
Then use your favorit mail client so send the document.
Hope that helps.