Well we got the ARRL study book for the technician class. However, since I am a cheap skate and got it off of Amazon, I did not realize that it was 1st edition. I will study it anyway and hope that there isn’t too many changes since this edition and the next. So far though it is very interesting and brings back some of the things I learned back in physics class. Now I just have to find the time to buckle down and cram all this stuff into my head.