The style of language and vocabulary are the learning level (Cl. 7) appropriately, the students have well understood the book. The word information is adequate and helpful with phonetic information for difficult words small explanatory drawings are that help that the joke of the book to the students not passing.
In the back of good questions are formulated to each of the chapters that help to take the most important aspects of targeting and the students have a good support when it comes to recognizing and understanding the core content of each chapter, and a comprehensive image gain of the figures.
All in all I can only recommend this reading as a school reading.