This looks like a source for a leanpub.com book (Book.txt gives it away, and the fact that this is all in a manuscript folder). I don’t think they have a comman

This looks like a source for a leanpub.com book (Book.txt gives it away, and the fact that this is all in a manuscript folder). I don’t think they have a command line tool to build epubs, but you should be able to get an epub from their web site if the author published it there