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keyword: HM – 39 free books.
All these books are free to read: either they're distributed with a free license, or they're in the public domain.
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These books do not seem to be included in the Directory of Open Access Books.
A Vision of the Future, Based on the Application of Ethical Principles
Jane Hume Clapperton
The Mind in the Making: The Relation of Intelligence to Social Reform
James Harvey Robinson
Introduction to the Science of Sociology
E. W. (Ernest Watson) Burgess and Robert Ezra Park