I didn't buy the textbook but most(>90%?) of the exam questions are covered in the notes. I am not sure how much time you have, if you can understand most of the notes, you should pass it easily. That being said, I only spend the last three weeks to prepare for the level 1 exam and even didn't have time to finish the notes. I would recommend you finish the notes first and tried the book 6 exam, if some concept are not mentioned in the notes, then find the related information in the textbook and learn more. Otherwise, it might be waste of time.
Hope I can pass the exam.

i feel that if only that you finish the notes and comprehend the concepts deeply in the notes ,you will have more than 80% to pass the exam.

so you should pay attention to the ethics,in this exam ,i didn't do it better,but many said that if you want to pass the exam,the marks of this part is vital for you!

another thing you have to heed is that the time,every time you take the mock test,let it be an true exam,this is my biggest feeling about this exam!