
I highly recommend the book. The authors recommend using Camtasia to record your videos. I have been using Jing (TechSmith) for years and Camtasia is a more sophisticated program by the same people. I am currently using the free trial but I love it and will be purchasing it when I buy my new laptop in a few weeks (my last laptop was stolen from school and it turns out that neither the school's insurance nor ours will cover the loss - so sad).
If you are not ready to pay for a program, Jing is free and does a great job at recording your audio and recording your screen. You only have 5 minutes in the free version but you can get a lot done in 5 minutes of screencasting. I love it but I am ready for something more.