Knowledge Bases

The Knowledge Base is a collection of documents, such as reports, policies, survey results and statistics, relevant to Open Access (OA) policies regarding OA books in the European Research Area. The collection was created as part of the PALOMERA project. It is an unparalleled resource in terms of providing a centralised hub for OA documents from across the ERA in a range of languages, varying greatly in scope from individual publisher guidelines to national mandates. We definitely need to link to it although it is not very user-friendly or searchable. 

See: https://knowledgebase.oabooks-toolkit.org/communities/

Open Access Network: Open Access Books summary Infohub

A German language (English option available) online summary info hub on OA books. Comprehensive coverage of all things OA but content probably covered in other resources. 

See: https://open-access.network/en/information/publishing/open-access-books