Rereading Extreme Ownership, How U.S. Navy SEALS Lead and Win. This is the only book on leadership that cites principles I've actually adopted. In additon to having illustrative business case studies, the war stories are awesome! Very engaging.
As an aside, Jocko Willink, one of the authors has favorably mentioned Starting Strength several times on his podcast (although he belongs to the "ass to grass" squatting school).
P.J O'Rourke wrote a wonderfully short book called "On the Wealth of Nations". He read it so "You don't have to". Smith's 18th century Scottish prose is VERY difficult to read and I believe I'm one of the few people on the planet that's read over half of WON. Good luck to you 1200cc! Theory of Moral Sentiments is even more difficult. I've only read a few pages of that one. Let us know how it goes. If I get a favorable report, I may give it another run.
I refer the forum's readership to the end of this, my erudite post on Hayek.
Don't feel bad. My experience with my daughter is that if it's not a "graphics novel" you can't convince a 15-year-old to read anything that's not required.