It has been a few years since I took my amateur radio license examinations, so I suspect things have changed a little bit. I am trying to get my oldest son interested and I want to get him some study materials. Is The ARRL Ham Radio License Manual pretty much the book right now? I know sometime after I was first licensed the Now Your Talking book became popular. I was sort of hoping that there was something online or as an iPod Touch application that was free or inexpensive, but I haven't found anything like that yet. Are there any other suggestions for study materials right now?