Mac's ibooks Tip can't access your library error how to solve

This problem occurs when the MAC device system is OS X 10.11.X, which causes the problem may be that we recovered the system from the time Machine (Time capsule). Its main performance is:

Make sure the disk that contains your library is connected, and then click "Try again".

Stack location: (NULL)

You can also restore your library, and then log in to view and download the books you purchased.

The workaround is as follows:

Step One: Delete file ~/resource pool/cookies/com.apple.ibooks.cookies

Step Two: Delete the file ~/resource pool/preferences/com.apple.ibooks.plist

Step three: Delete the folder ~/the resource pool/containers/com.apple.ibooksx and move the folder ~/repository Containers/com.apple.bkagentservice to our MAC device desktop.

Step Fourth: Reboot the iBooks after restarting the MAC device (note that the logoff is not working).