This was a textbook for a TESOL class I took. The first red flags came up in the first chapter when the author casually mentioned NLP as if it was a real thing and not a pseudoscience. He also entirely conflated it with the VAK model of education, which is another idea that has been debunked by decades of educational research yet still lingers on. Checking the glossary, his definition of NLP is actually a definition of the VAK model, though he credits the inventors of NLP for it. Even within the pseudoscience that is NLP, the pseudoscience of the VAK model is not prevalent. This type of error, right in the first chapter, made me seriously doubt the validity of this book.
Then, still in the first chapter, he gives the wrong definition of intrinsic vs. extrinsic motivation! He writes, "[This is] extrinsic motivation, the motivation that students bring into the classroom from outside. Intrinsic motivation, on the other hand, is the kind of motivation that is generated by what happens inside the classroom." This is such a core and crucial concept in education that to mischaracterize it demonstrates either a lack of understanding or a lack of value in the subject he is writing about.
Sloppy language like this does not belong in a book about teaching language. These errors, especially since they are right from start, are a disgrace.
Later, when he wrote about lesson plans, many of the examples he gave were both woefully inadequate and very unrealistic. He barely even mentioned objectives and the only examples he gave were not actually objectives (and did not make sense in any educational context). In the chapter about testing, he completely neglected to mention the existence of formative assessments (another unforgivable omission in a book about teaching).
On the whole, I would not recommend this book to anyone, including teachers who are just starting out. When I think back to my own beginnings as a teacher, applying things from this book would have made me worse most of the time. There are a few useful lists of types of activities for some aspects of English teaching, so I generously gave this two stars, but it feels like a stretch.