Hi there, for the trouble that 'Wordbook is either deleted or not currently accessible' on your Mac, you'd better use data recovery software to recover files beforehand. iBoysoft Data Recovery Software is highly recommended here. Feel at ease to download and install it immediately. Once the tool manages to recover the files and you can access them without any trouble, then you can update the Word app to boot your device into macOS Recovery Mode to rule out the error message.
Hope this answer helps you in fixing the 'This Document Is Either Deleted or Not Currently Accessible' trouble on your Mac.