I'm giving this one star, although I didn't actually dislike it, to counter the quite silly five stars currently showing.
Having said I didn't dislike it, I must explain that I found it hilarious, in a sad way, because of what it promises to be--and isn't--and what it claims to do--and doesn't. This is not one of those grammar tips books in which one amuses oneself by noting the grammatical errors: Bruton-Simmonds writes, on the whole, workmanlike prose. But his explanations of syntax, style, usage and vocabulary? Oy, vey! Priceless, truly priceless! This is William Strunk without any organizational framework, and without the focus provided by needing to instruct actual students. Also without any indication of the author's experience or credentials. Amusing, but ultimately a waste of time if you are seriously interested in improving your written English.
I often contemplate writing about the use of language. I learned some things from this book, including how nagging and critical such writing tends to be. It's probably not meant to be.