Oh yah, Merlyn 3D (or Merlin I forgot).

Here are some good tutorials:
http://www.3dbuzz.com
http://www.phong.com
http://www.teamphotoshop.com
There are lots more, but I am lazy, so check google.com and look at other sites affiliates and links, and their affiliates and links, and on, and on.

For some good books:
http://www.amazon.com
http://www.bn.com
http://www.booksamillion.com
And simply search for the product you are using, there will be tons. And check one of those book stores if they are near you.