How do I restore lost highlights and notes to an iBooks book?

Question

I have an epub book I am reading and it syncs between my MacBook and my iPad. In fact, this is one time I wish it didn't.
I had lots of notes and highlights.  Somehow, while I was reading the book on my iPad, I did something that deleted all the notes and highlights.  I closed the iPad and opened the book on the MacBook, but they apparently synced over iCloud and had been deleted from the MacBook copy as well.
I thought I could restore them from my Time Machine backup, but I have no idea what file to look for.  Notes and highlights are evidently not stored in the ePub itself, so where are they stored?  Or how else do I get them back?
(For what it's worth, the accidental deletion on the iPad went like this:  I was reading... dragged my finger to turn a page... saw that gobs of text got highlighted instead... looked for a way to delete the accidental highlight... "Do you want to delete this note?" ... yes... all gone, and no undo function!!! Grrr!!!)
Thank you.
iPad 2, iOS 8.1
MacBook Air, Mavericks 10.9.5; iBooks 1.0.1 (281)

Answer 1

I found this article that shows the folder we are looking for is here --
~/Library/Containers/com.apple.iBooksX/Data/Documents/AEAnnotation/
per http://mjtsai.com/blog/2013/11/06/the-problem-with-ibooks/ and http://computers.tutsplus.com/tutorials/beyond-highlighting-how-to-get-the-most- from-your-annotations--cms-20013
So I opened the files in TextWrangler to search for a word I know I highlighted in a particular book.  That helped me identify the correct file for the book I am concerned with.  I did a Time Machine restore of the file and got my notes back the way they were.