SiriusLi's comments

SiriusLi | 3 years ago | on: OpenStax: Free and Flexible Textbooks and Resources

If you look up the review scores on Amazon, they mostly get 4+ stars. Other interest might be in play. This is a direct challenge to the textbook rent seeking behavior by some professors, e.g. write new edition each year to destroy the second hand market, use digital logins for exercise materials and so on.
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