Tony and Eve were dear, dear friends of Patrick and Stephanie.
I found this reference to Tony and Eve, a scan of a page dated 8 Sep 2015, in Patrick’s “Fred” folder. Could the book have been one of Fred’s, or a gift from Fred to Patrick? I don’t imagine I’ll ever know.

I’m the son of Patrick of Meadows.
https://books.google.com/books?id=lNFB97o2tisC&pg=PT149&lpg=PT149&dq=Tony+and+Eve+Bonner&source=bl&ots=XFO9ocQmIF&sig=ACfU3U1YFKAwwBatfPAE1nGuM8XJ1RjjnA&hl=en&sa=X&ved=2ahUKEwjS1cKo9YfnAhWULc0KHZ1uD3oQ6AEwAHoECAgQAQ#v=onepage&q=Tony%20and%20Eve%20Bonner&f=false
Good sleuthing work, Christine! As a result of your efforts I located the book itself on Amazon: https://www.amazon.com/Lost-Classics-Overlooked-Under-read-Unavailable/dp/0385720866. Thanks!