Directory of Open Access Books (DOAB) The Directory of Open Access Books (DOAB) contains over 40,000 Open Access research books. They have undergone a Peer Review procedure. A detailed search allows you to filter the results See Website Free-of-charge: Yes Open Source: No Non-for-profit: Yes Privacy Notice: Link Operator: DOAB Foundation Country of Domicile: Netherlands Link: https://www.doabooks.org/