Well, 'a j finn' could be a person's name, perhaps an author or a character. 'End of story' is a common phrase that means there's nothing more to add or discuss. So it might be saying that with regard to this 'a j finn', that's all there is to it.
Overall, the ending of A.J. Finn's story is complex and thought-provoking. It ties up some loose ends while opening up new questions for interpretation.
The Unti Finn novel by A. J. Finn is a complex mystery that weaves together multiple plotlines and keeps the reader guessing until the very end. It's full of unexpected twists and turns.
I'm not sure if there are other novels as famous as 'The Woman in the Window' by A J Finn. However, his writing style in that book is characterized by creating a sense of claustrophobia and paranoia, which makes for a very engaging read.
No. It's not a common phrase at all. I've never come across it in normal English usage. It seems like an odd combination of a possible name 'finn' and the very common 'end of story' which is often used to close a discussion or emphasize finality.