This community service activity aimed to strengthen writing skills through book-writing training for the community in Serang City as an effort to develop a sustainable literacy culture. The activity was motivated by the need to improve the community’s ability to transform experiences, knowledge, and ideas into structured written works. The program was conducted in January 2026 for one day using a participatory training approach consisting of material presentation, discussion, writing practice, mentoring, and evaluation. The training covered idea development, topic and title selection, book outlining, chapter development, writing techniques, and initial manuscript editing. The activity was supported by CV. AA. Rizky, a book publisher and IKAPI member, which contributed practical perspectives on manuscript preparation and book development. The results indicated that participants demonstrated improved understanding of the stages of book writing and greater ability to develop ideas into themes, titles, outlines, and initial manuscript drafts. The activity also increased participants’ motivation to write and document their knowledge and experiences. Thus, book-writing training can serve as a practical strategy for strengthening writing competence and fostering a productive literacy culture among communities in Serang City