This book considers the issue of moisture within the hive. The author gives particular attention to the effects of ventilation on curing honey and how it could contribute to swarming behaviour.
Honeybee Democracy is one of my favourite bee books. The book summarizes Seeley's life long quest to understand the natural behaviour of this marvellous insect. Rather then talking about what we should do to our bees, the book focuses on what and how the bees, when left to their own devices, decide to do some of the things they do.
Seeley goes into the details of his ground breaking experiments which encompass most of what we currently know about feral hives, the communication processes involved during a swarm and the characteristics of a good bait hive. We also get some insight into Seeley's scientific process and the creative approaches used to uncover honeybee mysteries.
While I consider this a valuable read for all beekeepers, the stories describing the honeybee's sophisticated approaches to communication and decision making will also appeal to the non-beekeepers with a healthy sense of curiosity. You can find a copy on Amazon here.
The following video lecture gives a summary of the ideas discussed in the book. Watch with caution if you haven't read yet read the book. You might spoil some of the suspense.
Decent free manual from the Penn college of agricultural sciences covering all the standard beginner info. It even has a section on urban beekeeping.