Okay, if you are looking for a book that will help you genuinely tackle 'difficult conversations', don't bother with this one. The general ideas in here are pretty much short, simple and won't offer much. Don't get me wrong, the book does what it says on the tin, albeit, in a very, very, very simple format.
When reading, I could not help to see that most scenarios are directed at a typical 'office' setting, with a certain emphasis placed on the hierarchy system of 'boss vs subordinate'. The book is essentially directed with a focus of how to build confidence. I found the section entitled, 'Say no and Mean it', to be of some value in this respect, offering some basic advice and guidance on how to not do tasks you don't want to. It was a shame this section was only 5 pages. Note, most sections in this book are very short.
On the plus side, the size of the book is a bonus. It is small. So small in fact, that one could easily put it in their pocket and at just over 100 pages, is not too thick. The book will help provide a guide on basic self confidence and makes for an interesting read, just don't expect it to work wonders.
If you are looking for an easy read, go for it. I would still advise to compliment your read with something more meaty. 3/5.