I’d like there to be a “reader sophistication” metric that works similar to “you may also like” recommendations, e.g., if I look up Gene Wolfe, it gives me sci-

I’d like there to be a “reader sophistication” metric that works similar to “you may also like” recommendations, e.g., if I look up Gene Wolfe, it gives me sci-fi authors in his vicinity of reading level or greater. I know that some have done this with lexical analysis of the text itself via LSA, but the results produce many false positives (i.e., high proximity).