I prefer speculative fiction (fantasy, SF, horror) but also read the occasional historical novel or thriller.
There is so much good stuff out there.
In order to give you good suggestions, it might be helpful to get better directions, like which books you especially enjoyed, maybe what topics you like to read about, whether you are looking for books aimed at younger readers or mature ones, etc.
Some fantasy novels that are too good not to have read:
- The Last Unicorn by Peter S. Beagle
- The Princess Bride by William Goldman
- The Neverending Story by Michael Ende*; if you liked that book and don't mind reading novels aimed for younger readers, check out Salman Rushdie's "Haroun and the Sea of Stories"
Try to track down the Time Master trilogy by Louise Cooper consisting of "The Initiate", "The Outcast", and "The Master".
I fell in love with the language and quirky story of Michael Shea's "In Yana, the Touch of Undying".
- A Dirty Job by Christopher Moore is a funny read if you like a bit of dark humor.
I also liked L. Sprague de Camp trilogy "The Reluctant King" consisting of "The Goblin Tower", "The Clocks of Iraz", and "The Unbeheaded King". There's also an omnibus edition called "The Reluctant King".
Historical novels I liked a lot were "The Pillars of the Earth" by Ken Follett and Noah Gordon's "The Physician".
There are a lot more books I could recommend but I'll leave it at that for the moment.
* If you think you know the story because you seen the movie, you don't! The first movie only covers about the third of the novel, leaving out quite some stuff and doesn't live up the source. The other movies... well, let's not talk about them as they have pretty much no connection to the novel.