The book "Development of the Syntax-Discourse Interface" offers a comprehensive analysis of child language development from the perspective of the syntax-discourse interface. It examines how various linguistic modules, such as syntax, morphology, and phonology, interact with each other and how these interactions influence the understanding and use of language. A central theme is pronominal anaphora, which demonstrates that adults require both syntactic and pragmatic knowledge to use pronominal elements correctly. These findings call for a reevaluation of language acquisition research, as children's errors in certain constructions may indicate an insufficient understanding of one or more of these knowledge areas. The book encourages viewing language development as an interplay of different domains of knowledge, leading to a deeper understanding of the complex processes of language acquisition.