Official strat guide is out in the States, if you are a stat freak. Got mine yesterday and had only ordered it 36 hours before. No tax on books. It isn't out in the UK for a month or two.
edit : that link is correct but not always working for some reason. If you dont get to the book, it gets you to their site, then just search for Titan Quest.
Nice for the class and skills infoz, but you have to be careful not to check out the spoilerz. Did see a small amount of infoz on later areas and mobs and it is very interesting.
It also has a small section on the world builder, which looks absolutely fantastic. You can design items, equipment and monsters, not just use them from a pallet (sp?).