I was looking for the location of iBooks files (including ePub, PDFs and others) so that I can curate the list of manually exported files. Finding iBooks in my Mac should not be a difficult task, although it took a few minutes. I thought of sharing that here in the blog for future reference and in the hope that some of yo may find it useful.
We will use the Terminal, as doing things from Finder tends to redirect us. A first place to look into is the following one:
Now, that may not be the entire list of your books. In case you have enabled iCloud, then things may be stored in your Mobile Documents folder:
cd ~/Library/Mobile Documents/iCloud~com~apple~iBooks/Documents/
For things that you have bought in the iBooks store, take a look here: