Mutsna, M., Bianto, M.A. and Kriswantoro, M.C. 2025. Recommendation Implementation of a Digital Book Recommendation System Using Item-Based Collaborative Filtering in a University Library Application.: Item-Based Collaborative Filtering, recommendation system, digital library, Pearson correlation, MAE. Jurnal CoSciTech (Computer Science and Information Technology). 6, 2 (Sep. 2025), 230–236. DOI:https://doi.org/10.37859/coscitech.v6i2.10011.