A good grammar book. This book is really convenient since it allows one hand to move very quickly to the information that is sought and, secondly, it is the right level. The presentation is well done and useful exercises for those who want to test themselves after reading the topic they are searching. For me this book is rather intended to "false beginners" and those who do a personal work (or work at home) rather than those working in class with a teacher. We can recommend it without hesitation.
