"I have just completed the lesson book. I'll have to say that of the 3 books I have purchased and gone through thus far, yours is absolutely the best and most straight forward. The other books I have used go through so much boring background and detail, one tends to fall asleep before you finally get to what you are trying to find out. I suppose that is why they cost from $40 to $50 and above (the printing cost of extraneous materials). Yours however leads one through the basics and builds one up to a higher level, while showing other than talking. Kudos to you! As the commercial goes, "Its so easy a Caveman can do it." Thanks again, Jim Evans"