Systemic Functional Linguistics is a functional model of language inspired by the work of Saussure, Hjelmslev, Whorf, and Firth. SFL was developed by Michael Halliday and his colleagues in the 1960s and has grown into a widely studied and research field, with growing interest in China, Latin America, and North America.

This new five-volume collection from Routledge focuses on the foundational papers underlying SFL theory and practice and illustrative papers that have inspired succeeding work.