Indefinites and the Type of Sets explores a new theory of indefinite noun phrase interpretation and definiteness effects. Provides an introduction to aspects of the semantics of noun phrases, as well as comparing alternate theories. Explores a new theory of indefinite noun phrase interpretation and definiteness effects. Written accessibly by one of the world's most prominent formal semanticists. Useful for students and scholars in formal semantics as well as the neighboring fields of syntax, pragmatics, and the philosophy of language.