It is really well presented. Each time, the difficulty is very clearly addressed in a short paragraph. The rule is explained in a few lines, and then, in a small period of application with three sentences, one must check if the underlined words are spelled correctly. At the end of each chapter, there are exercises to make the point. The book concludes with records that allow us to train in real conditions of the test.
The book is very useful for rapid progress in French, fill gaps and prepare in good conditions to Voltaire Certification. I do not regret my purchase.