>>67589959Not mystery/thriller but my vote for most beautiful prose in a work of fiction goes to The Name of the Wind by Patrick Rothfuss. I'm mostly a fantasy reader, I suppose Sanderson's Mistborn trilogy has a bit of a mystery/covert slant, you may enjoy that one. What else...most of the stuff I read growing up was technically categorized as YA or kids books, but Fablehaven has strong enough writing to be enjoyed at any age, same for Ranger's Apprentice (only read through book 10) I'm also a huge Wheel of Time simp in spite of its flaws (the TV show is an atrocity)
Just read whatever appeals to you, and a lot of it. For me it's long fantasy epics and the occasional sprinkling of something else but if you're hungry for thriller take a peek through review sites and look for what's popular - very highly rated books are normally, at the very least, not bad.