This academic work, 'Information Services,' by Prof. Dr. Ribhi Mustafa Aliyan, serves as a cornerstone text in the field of library and information science. Published in 2014, the book meticulously details the various facets of information services, from traditional reference work to modern digital information retrieval systems. It covers the theoretical foundations, practical applications, evaluation methods, and the evolving role of information professionals. Aimed at students and practitioners, it provides a structured approach to understanding user needs and delivering effective, efficient, and relevant information solutions in libraries and information centers, making it an essential resource for academic study and professional development.