I just finished this book and wanted to say that it was quite good. It is not a lame self help book, but rather a systematic look at everyone's troubled relationship to wrongness. I would highly recommend it.
For an exercise in wrongness, please try the following the next time you are mistaken about something. Don't worry it should be soon :) Admit to yourself and others that you were wrong, period. Do not say you were wrong but or explain how you were almost right. Just, I was wrong. It is surprisingly empowering.