I'd recommend this book to any teacher - it's probably 110% more useful than any of the text books you were told to read on your teacher training course!
It's very readable. This is important because teachers (and that includes me) are too busy to find time to wade though dense theoretical texts. Secondly, and this probably shouldn't be surprising given what the book's about, it draws you in and the ideas contained within it are very easy to remember.
The job of a teacher is to explain sometimes really quite tricky ideas in short, sharp chunks, to people who are not always expecially engaged (i.e. teenagers), and then get them to use those ideas. This book explains very neatly how to do that more effectively. The authors' SUCCESs mnemonic (simple, unexpected, concrete, credentialed, emotional, story) is well illustrated and explained in the book and is very easy to remember and apply. Highly recommended.