"The Book You Need Exiting High School"
The author uses plenty of example from Davinci to Mozart to Proust to Darwin to Paul Graham to illustrate his points about Mastery and how it is not through some rare gift but through conscious practice and attention to detail. Understanding this and how it relates to your "life's work" can guide career decisions. I wish I had a copy of this when I left high school rather than learning on the job so to speak.