After I received the book, I thought, never pass the requisite the contents in the remaining three weeks but must now say that there was enough time.
The book is well structured, because it first addresses the different categories (Reading, Listening, Speaking and Writing), and gradually explained the structure of the questions and answers. If you have the initial chapter by there again own 'Cracking'-sections, where among other things, important tips on answering the multiple-choice questions or suggestions are given to build up the Speaking response.
Finally, there is the opportunity to work through a complete test, together with a detailed answer key.
First (using the Official Guide's) I did not know how to deal with the issues and how they are to respond most efficiently.
Fortunately, the 'Cracking the TOEFL'- Preparation Book any assistance that have absolutely helped me during the test, and have given me the necessary security for difficult questions.
As a single point of criticism I see, as previously mentioned in another review that some slight Reading Passages in the book - these are, as well as the questions to be answered, a little more demanding when tested in my opinion yet.
In summary, I would say that I 'Cracking the TOEFL iBT' has helped in every respect, and has allowed me eventually 112 points.