After upgrading to Mavericks all of my books from iTunes have been migrated to iBooks. They are no longer in my media library and I haven't been able to locate them as of yet. So where does iBooks store your books now?
They are now buried inside the user Library folder.
The full path is:
The Books.plist there contains itemID values that connect the book titles with their *.epub or *.ibooks names [iBooks 1.2, OS 10.10.5].