A seminal work of him was The sound pattern of English.
One of his better-known political texts is Manufacturing Consent -- The Political Economy of the Mass Media, which he co-authored with [Edward S. Herman]? and which was intended to show how financial interests in the United States' media influence the news. Controversy over this text has been fierce and extensive.
It is worth noting that almost everything about Noam Chomsky's ideas are controversial, both in linguistics and politics. He has a great many detractors both in academia and the general public.
See also: Chomsky hierarchy /Colorless green ideas sleep furiously, Corporatocracy, Doublespeak