Spent the last month of so trying to work out what I have to do with that file on my hard disk that claims to be a novel.
Having never done anything like this before, I must admit I was at a loss. Then I found Reedsy.
They have a brilliant article explaining all the steps needed to self-publish.
How to Self-Publish a Book in 2024
Looks like the next step I should take is to hire an Editor to perform a Development Edit, to ensure that the story makes sense.
