Bastiat is excellent but very specialized.
Friedman and de Tocqueville, yes and yes.
I thought about Lewis - but before I'd put Mere Christianity I would plump for his volume of the Oxford History of English Literature. That demonstrates his complete and total grasp of not only the literature of the 16th century, but all the historical and religious underpinnings that supported it. Either that, or The Discarded Image . . .