Atlas Shrugged
Fountainhead
by Ayn Rand
Ayn Rand also wrote a novel about the period of 197-1920 in Russia 'We the Living'. It is partly autobiographical.
I'd thought of those books but, length notwithstanding, I'm not sure that Rand is a 10th grade level. The books I listed are used in high school already, so they work well, both the content and hte length/level.