Actually, you'd be amazed at how many spelling errors get by in books nowadays. The most common errors I see are where the word is spelled correctly but the context is all wrong ... thing becomes think. Comes from having editors using spell checkers.
Jeff's books had some errors and some technical errors but they were great reads.
You're right of course. My post came across as snotty and I certainly did not mean it to be that way. My apologies to all.