The Silmarillion by JRR Tolkien will always and forever be the first book I recommend to anybody :D. Everything about that book is unearthly and yet so absurdly relatable. I love the way Tolkien amalgamates all the mythology he consumed into this book. But you must remember to read it with the other parts (Ainulindale, Valaquenta, Children of Hurin, etc) of this fantasy world. I am telling you, if you enjoy fantasy, you will NOT be disappointed.
If you're just looking for a light but thrilling read, "Gone Girl" is a decent page turner. Then there are always the dystopian classics, 1984, Brave New World, etc. Ooh, also any of Murakami's work really.
Recently, Mo Xiang Tong Xiu's works have become my guilty pleasure (hehehe). If you're into yaoi and donghua, you will love this work. The characters are intense and the stories are pretty engaging.
Finally, if all this is too much of a light read for you and if you like reading about sociology, like I do, I recommend "The protestant ethic and the spirit of capitalism" by Max Weber. I got a change to check it out recently and man, it has some fascinating perspectives. Ooh! and you should definitely go to https://www.goodreads.com/, I love that they have some epic recommendations tailored to one's preference.