OAPEN

A world of scholarly books.
Open to all, built to last.

OAPEN connects libraries , publishers , researchers , and funders with a global infrastructure for peer-reviewed open access books to advance research and the public good.

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Our collection, in numbers

These numbers reflect the collective global ambition to realise a fully open access (OA) books future.

Monthly downloads: 1.5 million+

Open access books: 40,000+

Participating publishers: 450+

Languages represented: 80+

The latest from OAPEN

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Spotlight
Conference attendance

Come meet us in person at these conferences. This is a rolling list and as new conferences and events are added older ones will be removed, so make sure to check back regularly!

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Spotlight
Weekly service update: OAPEN Library Dashboard

Following recent communications, we are continuing maintenance and enhancement work on the OAPEN Library Dashboard over the summer. We appreciate your continued patience and understanding. Please check back regularly for...

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Spotlight
Press release: OAPEN and Max Planck Society partner to build collection of funded open access books

The Hague, The Netherlands, 16 September 2026. The OAPEN Foundation is delighted to announce a new partnership with the Max Planck Society (MPG) to build a dedicated collection of open access books funded...

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Blog post
OAPEN goes to Switzerland: A visit to our partner CERN

Riding a heat wave The OAPEN Tech team met with the Open Science (OS) teams at CERN in Geneva, Switzerland, on the 25th and 26th of June. After rebuilding the team following...

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Blog post
Meet the DOAB & OAPEN Ambassadors: An Interview with Melissa Chim, Ambassador for the USA

Melissa Chim is Scholarly Communications Librarian at Excelsior University in New York, United States of America. Hear what she had to say about joining the ambassador programme. What motivated you to join DOAB as an ambassador?...

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OAPEN presents the

OA Books Toolkit

For authors

The Toolkit offers clear guidance on open access (OA) book publishing for researchers and authors, and supports policy makers in shaping effective OA policies for books.

Go to the Toolkit →