Wattpad is a, let's call it commercialized, solution. Like, why does it want me to create an account so bad? That's why this project was created -- on GitHub there seemed to be literally zero recently-updated tools for working with it.
I'll be honest. I do not know all the specifics of how writers can structure their work on Wattpad. The tool was only tested on this story, which only has text, and was recommended to me by a friend, and was the main reason this tool even exists.
From what it looks like, though, it should be fine, as the server seems to just give you the HTML for the text...
Anyway, here's a link to the Issues tab on wpdf's GitHub if you see something that's not working.
# Display help with all supported options, autogenerated by argparse.
$ wpdf -h
# Download a full story (wattpad.com/stories/{StoryId}) into a file.
$ wpdf -o MyStory.pdf -s StoryId
# Download a full story into a file, but with a bigger-than-default Table of Contents.
$ wpdf -o MyStory.pdf -s StoryId --toc-length 5 # 5 pages
# Download a full story into a file, but with a custom font.
$ wpdf -o MyStory.pdf -s StoryId -f font-{variation}.ttf # assumes there's `font-Regular.ttf`, `font-Bold.ttf` and `font-Italic.ttf` in the current working directory
$ wpdf -o MyStory.pdf -s StoryId -R font-Regular.ttf -B font-Bold.ttf -I font-Italic.ttf # the same thing, but specified manually
# Download only certain chapters (of a single story, else it will crash!)
$ wpdf -o MyStory.pdf -c ChapterId ChapterId...