Great value, lots of words to learn
I haven't had this for long but can already tell this is going to be useful. I am preparing for the C2 exam in November. So far, this book has introduced me to a lot of words that I've never heard of before. The book is 100ish pages (plus or minus the table of contents, etc). I like how it's divided into different vocab themes.
I also have never used an e-book before and was surprised to find you can highlight words, look up words without leaving the app (built-in dictionary/translator!) and take notes. I prefer pen & paper for taking notes, but this is a bonus for any technology-loving folks here.
All of the other C2 books out there are $40+ and involve some sort of international shipping. So, I appreciate this low price point for just dipping your toes in the water to start your C2 studying.