A real introduction: easy words, learner-friendly materials... As the book itself mentions: Because language is created and processed both between interlocuters and within the human mind, much of what is of interest in applied linguistics is hidden from direct view and study.
Pitched a little over my head, but I'm not surprised by that because one of the chapters mentioned that this was a text for graduates (one would suppose if linguistics) whereas this is my very first book on linguistics (knowingly).
I found out, mid way through this book, that applied linguistics is not what I wanted to read; I actually want to read about linguistics. What I read here was how second languages are taught which, again, was not my intention.
Still, onwards and upwards. I survived. I know now more than I did when I started.
I wouldn't recommend this as an intro to the subject of you have no knowledge of the subject because there's a lot of terminology in this book that goes unexplained.