Just a thought...if you get too technical with the aviation content you may lose most of your readers as most don't know or care about general aviation. As was mentioned earlier, only .02% of the population has any interest in flying. On the other hand, it will bother the heck out of any pilot reading your book if the details are anything but accurate. Specific aircraft, pilot jargon, navigation, instrumentation etc. are all areas that are black magic to the general reading public. The aviation parts should be simple to read for the non-pilot but technically accurate just the same. Pilots can be very hard on any writer that gets the details wrong while the average person doesn't know the difference between an aileron and an elevator. Remember the audience that you're writing to.