The book is a simple guide for writers at sentence level. The book features three important parts. The first part which include unit 1 and 2 explain what the sentences are, their types, and what they are made of — the elements of sentences. The second part which contain unit 3 to 6 elaborate the structures of the sentences and the common patterns of the sentences — the way in which sentence elements are arranged to form sentences. The last part highlights the common errors which might occur while writing sentences and how to fix those errors.
The information is good. However, the author should have a professional editor work through this. It doesn't look good when a book about grammar has grammar problems.
The Kindle version of this book had quite a few minor typos. Also, I don't think the author is a native English speaker because some of their word choices were a bit Awkward.
It started out well enough but halfway through it deteriorated. The author might know English grammar but can not write correctly in the language. The actual text is just filled with errors.