Need revie

Need honest feedback on my new notes style book for level 3 candidates, the first few chapters are available as sample – http://www.amazon.com/dp/B00ITNWSEQ , Please let me know what did you like and what would you like to improve in this. My first 15 reviewers on amazon also get 50% discount on the book, Just PM your email id and I will send you coupon

Thanks for your help