Request Tracker (RT) is a great product. I am the only sysadmin at a small company, and having an automated tracking system is going to be an immense benefit for me. I bought "RT Essentials" to help me get up to speed on RT3 really quickly. And, since it was written by the programmer who's responsible for RT, the book had lots of detail and tips.However, when it came down to implementing some of the code in the book, I found that it was already outdated. For example, I tried to set up the Autoreply template with Password by copying the code straight out of the book. It didn't work because the program codebase has changed too much since the book was released.I was able to fix my template problem by hooking into the great RT user community, where the author contributes frequently.All in all, I thought the book was really helpful for getting RT installed and getting me up to speed. For the nitty-gritty, I'd rely on the online wiki and great user community.