I was reading The Real Inspector Hound by Tom Stoppard and halfway through, I felt like I was reading something Quentin Tarantino would write. It was good! Sometimes, there were thin lines between that and the ridiculous stories I'd read at a comic book shop though. Just like with existential stories where they use the story within a story or play within a play. I always admire the authors that use the whodunnit thing effectively without having it come across as one of the stories that do anything to give you a WTF ending. My question is, for those that read these kinds of stories, what are some big factors and details about the writing type or the concepts that differentiates these stories from other stories like Seven Psychopaths or a C.S Lewis story? For instance, after reading 'Rosencrantz and Guildenstern Are Dead', I was blown away. It was done very well. What do you think makes or breaks the thin line?