Get a book about Op Mockingbird. Look it up if you have never heard of it.

It's a bit of a read, but the Dune series opens the mind to the benefits of conservativism. It's also what brought the idea of a god emperor into the modern memesphere.

You could give him a far left book on wokeness.

Smiths “The Wealth of Nations” is subtle. If you aren’t for capitalism and freedom after reading it then you didn’t read it right.

Thomas Sowell - basic economics ! Impartial and exposes the irony of left policies without being negative - uses common sense

Or Milton Friedman YouTube videos - good debates on economic truths that exposes the faults of big government and socialist policy