• The easiest way to fix the iBook failed download hell is to navigate to : /Users/yourusername/Library/Containers/com.apple.BKAgentService/Data/Documents/iBooks/Books/
    Put the finder view into column mode, then select each of the listed books (mostly just lots of numbers) until you find the one that keeps failing the download. Move that file to the trash, start up iBooks and re-download.

    • Unfortunately, I can assure you that trashing the listed books does not fix the problem. 🙁

      • Sorry, works for me.

        • Are you experiencing the failed downloads or are you just testing remove/redownload?

          • I’ve had the failed download problem at least three times (the last time was with one of your books actually). A book would almost complete downloading and then fail. Over and over ad nauseam. After trying someone’s solution of throwing away the pref, plist, some other file I don’t remember, and the entire BKAgentService folder, I finally tried just getting rid of the offending file. After starting up iBooks, it downloaded normally.