: Re: Command line extraction of metadata (title. author) from epub file I would like to use a command line to extract the title of a book (possibly also other metadata) from its epub file and return

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Ok, so since nobody has ANY info on this online and this is the top search results. Here is what you are looking for. exiftool -a -u -g1 nameofthe.epub. This line gives you a giant output of all the metadata tags you can extract using exiftool. exiftool -t -Title -Creator -PublicationDate -CreatorFile-as nameofthe.epub this is how you use it. If you push -t lowercase it shows you the description of the tags you pulled. If you run -T uppercase, it just shows the tags. Your welcome. Enjoy.
Edit: Also, since exiftool is a GIANT PITA and their help is semi useless. Here is a few scripts I wrote for it that might help someone out. This took me forever... These are formatted for batch files with %% and ". You may need to edit
This moves any epubs in folder DIR into folders sorted by their Creator (Author).
for %%f in (DIR*.epubs) do (exiftool "%%f" "-Directory<Creator")

This renames any epubs in a folder, to the Title and Author
for %%f in (01-input*.epub) do (exiftool "-filename<$title - $creator.%%e" "%%f")

To make them recursive into subdirectories you need to change the for formatting. Example
for /R "01-input" %%f in (*.epub) do (exiftool "-filename<$title - $creator.%%e" "%%f")

Edit2: On the off chance your tags contain "illegal" characters, outlined here (https://exiftool.org/filename.html), place the tag inside {} and put a ; at the end of the tag. This strips those out so it works. Example script.
for /R "01-input" %%f in (*.epub) do (exiftool "-filename<${title;} - ${creator;}.%%e" "%%f")

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