Hi do any of you use this series - I came across one volume probably at a used bookstore . I just found it on my shelf and dd devoured it. I am thinking of getting more in the series - they aren't that cheap though, so I wondered if others had used these. It seems to be a good source of age-appropriate quality literature. But I would think that if they were widely used, it would be easier to get them more cheaply, or as a set on the used book market. But they don't seem to be available that way.  So that led me to wonder whether I should spring for the whole set or still go one by one.
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