Public Opinion by Walter Lippmann, written 100 years ago but honestly just as applicable today. Libre Vox even has a free version up on YouTube[1]. Chomsky actually took the title of his book from Lippmann's, but Lippmann's is a much more advanced and nuanced take (also Chomsky has grossly misrepresented what Lippmann was saying, so I find it hard to trust him).
[1] https://www.youtube.com/watch?v=vX1eEQVDdjA&t=1s