@BetterRed
Sorry I am just not getting this.
I selected 2 books went to Edit Metadata and selected the Search and Replace tab
Entered details as the screenshot below.
http://prntscr.com/69c92y
The link did not appear in the Book Notes of either of the 2 books.
I then tried one book that already had a link and one without and entered the original link in "Search For". The link was change for the book which already had a link but wasn't added to the book that had none.
Finally, in desperation I actually typed the word
nothing in the Search For box with the link in the Replace with box.
Unsurprisingly, that didnt work either
I am obviously doing something wrong. Feel like I am so close to mastering it. Sorry to be a nuisance but I do not like to give up.
Thanks