Psychology (1st edition)
Rose M. Spielman, Kathryn Dumper, William Jenkins, Arlene Lacombe, Marilyn Lovett, Marion Perlmutter (OpenStax), 2014
CC BY 4.0 Older edition, still CC BY: free to send with attribution. The newer 2e is non-commercial.
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Rose M. Spielman, Kathryn Dumper, William Jenkins, Arlene Lacombe, Marilyn Lovett, Marion Perlmutter (OpenStax), 2014
CC BY 4.0 Older edition, still CC BY: free to send with attribution. The newer 2e is non-commercial.
Rose M. Spielman, William J. Jenkins, Marilyn D. Lovett et al. (OpenStax), 2020
CC BY-NC-SA 4.0 Non-commercial use only: link, do not resend.
Noba Project, Diener Education Fund (many module authors), 2026
CC BY-NC-SA 4.0 Non-commercial use only, and Noba's own terms apply: link, do not resend.
Alexis Bridley, Lee W. Daffin Jr. (Washington State University), 2026
CC BY-NC-SA 4.0 Non-commercial use only: link, do not resend.
Denis O'Hara, Jim Schirmer, Michael Ellwood, Kate Witteveen (University of Queensland), 2025
CC BY-NC 4.0 Non-commercial use only: link, do not resend.
Sigmund Freud, 1913
Public domain Public domain in the USA (1913 Brill translation): free to send.
Sigmund Freud (preface by G. Stanley Hall), 1920
Public domain Public domain in the USA (1920 translation): free to send.