This book contains lots of useful, real-life phrases divided into 3 levels: beginner, intermediate and advanced. In each part you will find expressions grouped into different topics like "ways to make and respond to an offer", "phrases for compliments" etc. The only drawback I see is that only some of these phrases are explained (what they mean, in which situations they can be used, whether they are formal/informal), so someone who studies on their own will have to do a lot of work researching every phrase.
The next part of my review is for Shayna. I noticed a couple of minor errors that you might want to correct in your next edition. Sorry if such things aren't welcome. Let me know and I'll delete this part of the review:
1. 10 phrases for estimating and guessing: 6. I wouldn't be surprised if [Peter asks Jill to marry him] - should be "asked" in this case, it's conditional 2.
2. 5 ways to say someone is cor-
I believe you meant correct, the word is incomplete. Maybe it's just my reader though, I have quite an old Nook.
3. 10 phrases for facial expressions: 8. His eyes glazed over. (= he appeared
The explanation is incomplete.
Also, the font size in "6 phrases for talking about future plans" is different from the rest of the book.
(review of free book)