and What Do You Care What Other People Think? both by Richard P. Feynman et al.
Hackers: Heroes of the Computer Revolution by Steven Levy
All three of these books I happened to have read between my sophomore and junior year of high school.
These books changed my life because they provided accounts of people (geeks) pursuing their love of science/technology in a fiercely dedicated and independent way, all at a young age (you get early accounts of folks like Stallman, Gates, Jobs, Woz, etc. as 20-somethings in "Hackers") , and ended up making huge contributions to research/industry. You also get to hear about the enormous sacrifices, regrets, and risks taken (some succeeding, some failing), and ultimately an important perspective on the lives of some very smart and important characters in a way that I think is still relevant to graduating high school kids today.