Dungeons and Dragons 4th edition is a very rich game with a very rich history. It can be daunting to know where to start, in particular when referring to the ruleset or the campaign setting itself. Here are collected resources that relate specifically to The City of Towers campaign.
The actual rulebooks that will be required for the campaign are contained on the Rules page. In addition, house rules, and limitations for character creation are contained within.
External sites that might be of help can be found on the Links page. In particular, these are sites that relate specifically to the campaign, or to playing Dungeons and Dragons in general.
An almanac is a usually annual reference book composed of various lists, tables, and often brief articles relating to a particular field or many general fields. In the case of this wiki, the almanac section will include reference articles about the world of Eberron and cultural information brought out in play.