Without wishing to prejudice anything.........................

What would happen if someone wrote a book with a character named 'Anton' who displayed the characteristics of a character to whom reference has been made in these hallowed pages?

Would this be enough to make this character existant in fiction thus being able to be interacted with in the well of lost plots and hence further up the ladder in jurisfiction?

Or is there some little plot device which rules such actions out?

I guess it depends on whether the book exists for "real" or whether it only exists within the world of Thursday Next. That is, Thursday is real from her own perspective, but part of the "real" BookWorld from ours, while Thursday's BookWorld is actually a sub-BookWorld from our point of view. If someone in real life wrote a book like this, the character would exist in our BookWorld, of which Thursday is also a part, but since Thursday has displayed no ability to jump out of her book into the "real" world, or into other books in our BookWorld, I'd say she and others from the TN series would not be able to interact with someone in another book.