This site is a screencast site that actually contains valuable information. I’m not saying that screencasts like Summer of NHibernate don’t have value. Summer of NHibernate is an excellent source for information for a good introduction to NHibernate.

What I like about TekPub is that use of domain experts on the subject. For Mastering NHibernate Rob Conery enlists the help of Oren Eini to dive much deeper into the material.

As the owners of the site put it, "Techbooks pretty much suck most of the time and you end up spending a whole mess of money when really what you want is to spend less time (and money) and learn from the people you trust."

If you’re looking for some excellent material then I urge you to check out TekPub.