The Bloomsbury Companion to M. A. K. Halliday is a comprehensive and accessible reference resource to one of the world's leading and most influential linguists. Born in 1925, Halliday is the figure most responsible for the development of systemic functional linguistics (SFL). The impact of his work extends beyond linguistics, into the study of stylistics, computation linguistics, visual narrative and multimodal communication. He is considered a founder of the field of social semiotics. Written by leading figures in the field, the volume provides readers with an authoritative overview of his early career, his most important theoretical findings and how his work has influenced linguistics as a discipline. From the publishers of his 'Collected Works' and 'The Essential Halliday', this is another must have book underlining Halliday's era-defining impact on the field of linguistics. Webster must be congratulated on his impressive editorial work. The book will serve as a truly important guide to Halliday and Halliday's theories in the second decade of the 21st century.