I’ve got an iBook Pro laptop running OS X (10.11.6) and iBooks version 1.5.
When I import a book to iBooks, often it shows the Author as “Unknown”, or else gives wrong information (e.g.: author listed as “FirstName LastName” rather than “LastName, FirstName”, so the Alphabetical By Author sorting sorts by FIRST rather than LAST name). It’s exceedingly irritating to have half an author’s books sorted by FirstName and the rest by LastName!
NONE of the advice I’ve found anywhere (including here) gives WORKING info on how to fix this. I’ve tried saving files as PDFs and changing/adding Author info when saving the PDF, but iBooks doesn’t show those changes.
—–
AmyCat
I'm using macOS Mojave with Books (it isn't called iBooks anymore) and I was able to do it. I switched to List view at the top. Then I clicked the book to select it in the list. After that click to select it, I clicked and held for a second over the title or author field and it became editable. Give that I try, though I'm not sure it will work in the older version of iBooks you have.