There isn't another book like "Gödel, Escher, Bach"; when I ordered it at 16, because I was curious after having seen it mentioned in very different contexts, reading it was a life-changing event.

Because this is beyond what your typical high school teachers can discuss, quickly followed orders of biochemistry university textbooks, and thankfully now - a few decades on - I get paid for life-long learning, grateful for each moment of awe.