In a terminal window, files and subdirectories are taken starting from the "current directory". For example, if your ebooks are in ~/Books, then first make sure that Wane.pdb and the script ereader2html.py are in ~/Books (~ is your home directory, I'm not sure what this is called on a Mac). Then in a terminal window do the following:
Code:
cd ~/Books
python ereader2html.py Wane.pdb Wane "My own name" "12345678"
The cd (change directory) command puts you in ~/Books, and the python command should create a subdirectory ~/Books/Wane and write the HTML and images extracted from Wane.pdb into it. Note that there is no "." before ereader2html.py.
You don't have to use ~/Books, replace this with whatever directory you want (but the ebook and the script should be in this directory).