I'm quite sorry to say it but this book is absolutely essential! We all know how hard is to deal with difficult people -or just any people.
This book takes you through the mess of bullies and manipulators explaining all the hows and the whys.

Straightforward, no-nonsense, fun, witty. And useful! And not malicious, which is very important.
This is not a complicated psychological book, but the book showing the straight solutions - which are not simple-minded, but might be truly working! (*might* because I have not tried all if them :))
Really, I find the approach being working - mature, solution-minded, reflective (take you into the equation!) and practical. I even found some points to solve my work problems (and where I might be part of the problem).
Read more on the subject, but this is definitely book I would recommend as a part of the understanding the problem and solution.

This is a rehash of traditional management books--how to manipulate other people while never actually dealing with the business practices that might be the cause of their behavior--but it is from a business perspective, so it is interesting to see whinging, sickies and industrial tribunals.