Book excerpt: Get to grips with the fundamentals of semantics research. Written by a team of world-class experts, this book introduces the subject for a broad audience of linguists, cognitive scientists, philosophers, and computer scientists. It explores the core concepts of sentential semantics and includes sections on questions, imperatives, copular clauses, and existential sentences. It also features essential research on sentence types, and explains central concepts in the theory of information structure and discourse structure. Now in paperback for the first time since its original publication, the material in this modern classic is an ideal resource for anyone involved in semantics research.