As expected, most of them are free to download. Peter Suber has all the relevant links:
Open Access Opportunities and Challenges: A Handbook (PDF) by Barbara Malina (ed.).
Science Dissemination using Open Access by Canessa and Zennaro.
Understanding Open Access in the Academic Environment: A Guide for Authors (PDF) by Kylie Pappalardo.
I also have Scholarly Journals Between the Past & the Future by Martin Rundkvist.

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