We really prefer separating "które" (which) and "jakie" (what, what kind). "Which" suggests a closed set of phrases, usually not a big one.
Does this question ask what genre of books are read? Or is it like, here are some books, which ones do you read? I guessusong the word which answered my own question but I'm still asking it.
I'd expect genres. Or at least something like "oh, you know, ones that make my heart beat faster..."
I was very happy to see that "What kind of books do y'all read" was an accepted translation here. :)
What books are you read? is gramatically wrong. It should be "are you reading"