This book features a collection of 10 interviews with Christian M.I.M. Matthiessen, who is a key figure in Systemic Functional Linguistics (SFL) and has collaborated closely with M.A.K. Halliday since the 1980s. As noted by Professor Chang Chenguang, Editor of the M.A.K. Halliday Library Functional Linguistics Series, "this collection of interviews serves as an important reference for scholars and students of SFL. It provides a unique perspective on the theoretical development and future outlooks of SFL, as well as Matthiessen's own interpretations of the theory. It also enriches our understanding of SFL and is a very useful addition to the series." Written in an engaging dialogic format, the book paints a vivid picture of SFL thriving among the landscape of general linguistics and of SFL as an important tool now being applied in various areas.