Children's chunky, square (?), condensed classics from the 1970s?

I am looking for a series of condensed, children's classics (e.g., Little Women, Treasure Island, 20k Leagues Under the Sea, Robinson Carusoe). They were paperbacks, and were very small (square, if I recall correctly), about 4" x 4". Specifically, I'd like to know who published them. Do these... show more I am looking for a series of condensed, children's classics (e.g., Little Women, Treasure Island, 20k Leagues Under the Sea, Robinson Carusoe). They were paperbacks, and were very small (square, if I recall correctly), about 4" x 4". Specifically, I'd like to know who published them.

Do these books sound familiar to you?
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