I read How The World Works by Chomsky - it's a collection of his radio appearances and whatnot transcribed, so it's all nice n colloquial. I'm thinking Bullshit Jobs next, because apparently it's quite funny and easy to radicalize libs with, which to me at the moment feels more useful than dumping communist theory onto someone that'll write it off instantly because gommulism is when no iphone.
This one's a mixed bag in terms of accessibility. On one hand it's short and uses tons of movie references to support its points, but on the other hand it makes tons of offhanded references to concepts and writers a general audience will have never heard of.