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These Reader's Digest Books are great teaching aidsThey are not in print anymore but you can get used ones
One of the illustrators that David Adler uses is Will Hillenbrand. I think you will agree that he is a most talented illustrator and author. at some of Will's work. I'm sure you will be tempted to get some of his books too.
This is a short video from Will Hilenbrand
His thoughts are my thoughts too.
I relate to this presentation