Joy Berry's "Help Me Be Good" series is just what we needed! Yes, yes, I've talked with my kids over and over again about lying, teasing, being mean, etc... but the message doesn't always get across. This series of books has been really great for the kids. I can read a story about a particular behavior, and then we can talk about specific issues and applications within our household. The books are short and to the point, plus they have good, easy to understand illustrations. Now, we can discuss lots of different issues without sounding like we're preaching and lecturing.
It is available on Amazon.com