Purpose. The aim of the paper is to present the possibilities, achievements and good practices of the Mobile Library Service of the Zagreb City Libraries that aim to achieve the goals of the UN Agenda for Sustainable Development 2030. The Mobile Library Service is included in many activities of the Zagreb City Libraries. Currently, the Mobile Library Service is contributing to the following Agenda objectives: Objective 4 - Quality education, Objective 10 - Reducing inequality, Objective 11 - Sustainable cities and local communities, Objective 16 - Peace and equality, Objective 17 - Partnership for goals. Approach/methodology/design. The paper is based on a chronological follow-up of good practice examples of the Mobile Library Service of the Zagreb City Libraries which contribute to achieving the stated goals of the United Nations 2030 Agenda for Sustainable Development. Findings. In accordance with the evaluation of the regularly scheduled stops of the Bookmobile Service in June, a number of new stops will be opened at the beginning of the next school year, and some of the existing ones will be closed because the evaluation has shown that they are no longer needed in the City of Zagreb and the Zagreb County. The reorganization is aimed at promoting equality in the provision of library services and enhancing access to them. The mission is to provide everyone with equal access to library materials, information and knowledge. In 2018, the Mobile Library Service visited 77 stops, out of which 55 are in the City of Zagreb and 22 in the Zagreb County. The total number of mobile library members was 4,505, out of which 2,870 were children and 1,635 were adults. Within the Project 65 Plus, in the Book-to-Door program, the library collaborates with the nursing homes and visits the users individually. The acquisition of audiovisual and electronic material has also been intensified, including tailored material in the DAISY book format, intended for the blind and partially sighted persons. Social implications. The Mobile Library Service promotes equal opportunities providing the most customizable library service by increasing access and thus meeting the needs of the changing population regardless of the place of residence. Originality/value. The paper is an example of good practice and activities of the Mobile Library Service since 2017, when it started to actively organize and implement its own programs to promote projects, activities, and events such as the Croatian Book Month, the 65 Plus Project, Read to Me!, the Night of the Museums, the Book Night, the Days of Media Literacy campaign. [ABSTRACT FROM AUTHOR]