This is the eleventh volume in Professor M.A.K. Halliday's Collected Works. First published as a 10 volume set from 2002 to 2007, they have shown the sizeable and growing international interest across a number of disciplines in the systemic functional linguistics framework. Halliday's powerful theoretical approach to the study of language has contributed significantly not only to advances in our knowledge of how language works but also how linguistic insights may be practically applied across a wide spectrum of social concerns.