Trying to read at a higher level

Hello everyone, I a (23yr F) am trying to expand to a higher reading level. I currently have read almost every Freida McFadden thriller and love her as an author… along with many other thrillers in that same reading level. I love it but feel like i crave something slightly more advanced. Anyways whatever recommendations please drop them! I love thrillers, mystery, romance/thriller, fiction and starting historical fiction. Thank you ((: