Annabelle Lukin & Geoff Williams 
The Development of Language [PDF ebook] 
Functional Perspectives on Species and Individuals

This book presents a unique range of interdisciplinary work on questions of language development and evolution. It makes visible the significant contribution which meaning-oriented linguistics is making to debates about the origins of language — from the perspective of language evolution in the species as well as language development in the child. As well as linguistics in the systemic functional, or Hallidayan, tradition, the book offers contributions from primatology, psychiatry, sociology and education.