Reddit reviews Writing Academic English, Fourth Edition (The Longman Academic Writing Series, Level 4)

To be honest, instructor's guides for TEFL books aren't generally that useful (aside from a few gems like Cutting Edge). They usually just lay out which exercises to do in what order and toss in a few boring teacher-centered activities in the middle. Just looked at some of the reviews on Amazon and it looks like this was written for university-level native speakers. If the school isn't going to spring for the teacher's guide, it's not unreasonable for you to pick and choose what materials you use and design the course yourself.

Have you gotten a copy of the book yet, and is there something specific you're struggling with on how to adapt? I doubt that anyone has an entire course planned (materials included) for this book, and even if they did there's a good chance they taught it in a different context than what you're in. You might spend as much time adapting the materials to fit your needs as you would have making them yourself.

If you haven't taught writing before, it's a pretty straightforward process. Start with a model text for the genre you'd like the students to produce. Next pick out key discourse features, grammar points and vocabulary sets, and get them to notice how each is used in the model text. Next, start scaffolding the pre-writing process and get them started on their assignments. Follow that up with feedback, and use their strengths and weaknesses to plan your next cycle of lessons.

I've used the Longman Academic Writing Series before (Upper intermediate book in link) and it follows the outline above pretty well. Beginner/elementary students start with short paragraphs and it gradually builds to full essays in the last book.

Beyond the Sentence by Scott Thornbury is a great book for getting your head around discourse analysis, which is a key concept for teaching writing effectively. It's also one of the more readable TEFL theory & methodology books.

Sorry, that was all a bit off from your initial question, but I hope it was somewhat helpful.