I doubt they are very popular. I mean, it's such an odd combination of things - spud pickles and ghost radar. Most people probably haven't even heard of this concept, let alone it being popular.
I'm not sure specifically what 'Secret de John Secret Story' is about as it's not a widely known common term. It could be a very personal or a niche story related to someone named John.
Well, I'm not entirely sure specifically what 'spud pickles ghost radar stories' are. It could be some really strange and unique tales that combine the idea of spud pickles (which is an odd combination in itself) with ghost radar. Maybe it's about some spud pickles that are somehow related to detecting ghosts using a radar? But this is just speculation.
Well, the 'John William De Forest Great American Novel' is important for a number of reasons. It may have been a pioneer in representing the American psyche in literature. It could have been one of the early works that tried to define what it means to be American in a literary sense. It might have introduced new literary techniques or perspectives that were unique to the American context. Moreover, it could have served as a mirror to the society of that time, showing both the good and the bad aspects of American life, which is crucial for understanding the historical development of American literature and culture.
I'm not specifically familiar with a 'John de la Rose' in the context of science fiction. There could be many relatively unknown authors in the vast field of sci - fi. Maybe he has some self - published works or is emerging in a specific sub - genre community.
As I don't know about John de la Rose's works in science fiction, it's not possible to recommend his books. You could try looking for reviews or mentions of his work in specialized science - fiction forums or blogs. There might be other readers or enthusiasts who know more about him.