Deletion of Subspace (Star Trek)

Comment: Although a great many people are !voting "keep" based on ''The Physics of Star Trek'', the preview in google books is less than thrilling. While the concept is mentioned a half dozen times,  says that ""Significant coverage" means that sources address the subject directly in detail". I'm not seeing that the subject is discussed directly, and in detail. However, I'm also not convinced that this subject isn't notable, just that ''The Physics of Star Trek'' alone isn't enough to show that notability
Stance: comment
Cited policy: Wikipedia:Notability (WP:N)