Unfortunate that this is out of print. It is an excellent book about all defenses. It lists odd and even defenses and the strengths and weaknesses of each. Particularly valuable is a position by position list, and their basic alignments and keys. I've used it for high school, but you can see application to just good teaching at all levels. I "loaned" mine out and can't get it back. Well worth the time to look for it.
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