These books are the product of twenty years of research and teaching.  I am delighted to offer them to the world free of charge as e-books.  And I gratefully accept contributions in support of this work.

Your contribution helps me to keep this site online and to keep expanding the Cooperative Communication Skills Library (helps me pay the rent, too!).

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Dennis Rivers, the author
of Seven Challenges
Workbook and The Geometry
of Dialogue, in front of one
of his first geometrical prints

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Thank you for your support,

Dennis Rivers