Novels are for understanding human nature. Books on philosophy are about the connection of language to the human brain. Once I read Heidegger's Being and Time and noted how his language expressed the thesis he was writing about, I was brought to a new level. Words are everything. How something is said is critical. Heidegger enthralled me. Then I read Sartre's The Critique of Dialectical Reason, which was pretty straightforward relative to his Being and Nothingness, which may be my favorite book because almost every sentence is a complex puzzle of meaning. That's why I read, to understand that the primordial ooze comes from words and sentences. Here is a random sentence from Being and Nothingness: "Since I am always beyond what I am, about-to-come to myself, the 'this' to which I am present appears to me as something which I surpass toward myself." His is a book that teaches you to think.

Heidegger said that truth is the correctness of propositions and the unhiddenness of being. I would only like to re-read Being and Nothingness as opposed to the others.