The purpose of the Directory of Open Access Books (DOAB) is to enhance the discoverability of open-access books by providing a global index, thereby facilitating access to scholarly works for researchers, students, and the general public. The DOAB serves as a platform where academic publishers can contribute metadata for their open-access titles, ensuring that these resources are easily searchable and accessible. Additionally, DOAB aims to support the principles of open science by aggregating information from various open-access publishers and enhancing the distribution of openly licensed scholarly content. The initiative focuses on increasing the visibility of scholarly books, promoting academic collaboration, and ensuring the sustainability of open-access publishing practices