Read two doorstoppers over the summer and I wholeheartedly recommend them:
Infinite Jest by David Foster Wallace: sort of a memed on book at this point, but it really does affect you. In one of his interviews, Wallace talked about how despite being so materially fulfilled, how he and those around him were ultimately unhappy. This theme was very significant in the book and I found it to be quite poignant and led to self-reflection. The first ~200 pages are difficult to get through because so much information is thrown at you, but almost everything harmoniously fits together by the end which makes for an extremely rewarding, and due to Wallace’s prose and humor, fun, reading experience.
Master of the Senate by Robert A. Caro: describes the Senate career of Lyndon B. Johnson and broadened my insights both in a political sphere and a more personal one. One of Caro’s main theses in the book is that the Senate, by design, is extremely resilient to change. However, Johnson managed to push a civil rights bill through the Senate, the first since the Civil War era. This ties into the personality aspect of the book and how Johnson managed to appease both gung-ho egalitarian liberals and the staunchly racist Southern Democrats to get what he wanted done. You come out with a better understanding of how power structures operate and how they are to be navigated.