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.

Learn more about how we support our community →

Our collection, in numbers

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

Subjects included: 2,640

Participating publishers: 487

Funded collections: 125

Languages represented: 86

The latest from OAPEN

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Spotlight
Forthcoming event 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
Welcoming publishers and library supporters - Q2 2025

We are grateful to the following libraries and consortia who have either supported us for the first time or continued their long-time support; and to the following publishers who want to make their OA books more discoverable...

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Spotlight
OAPEN Library hosts new Big Ten Open Books collection on Indigenous North Americans

The Hague, 10 September 2025 OAPEN is pleased to announce continued support for Big Ten Open Books by hosting its latest collection in the OAPEN Library, making...

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Blog post
Change of technical leadership at OAPEN and DOAB

Shortly after the launch of the OAPEN project back in 2008, I remember that the project coordinator, Eelco Ferwerda at Amsterdam University Press (AUP) introduced a new colleague to the project: Ronald Snijder. Ronald was...

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Blog post
A book is a book in any other markup language

Updating the OAPEN Library’s metadata feeds Since the launch of the OAPEN Library in 2010, the metadata feeds for our collection of open access (OA) books and chapters have always been and will continue to be freely...

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Bluesky Feed

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