Any life questioning, philosophical or convoluted book recommendations?

Im new to this sub. But i am curious to see if theres anybody here that can recommend me a book that has a deep and convoluted writing or philosophy in it. Basically, i want a book that would expand my horizons and views of life in any way, shape or form. For reference, I love works Nietzsche, Albert Camus and Viktor Frankl. Honestly, I would read anything that sounds like something i would like and get fixated on. Sorry if it sounds like i am asking for too much.