Vail Manfredi is a retired engineer from the Brazilian pulp and paper industry, where he worked for 28 years in leading global suppliers of bleached eucalyptus kraft pulp, performing Research and Development studies and providing technical support to the commercial area (Customers Technical Assistance). He is a specialist in eucalyptus pulp refining having published several technical papers on the subject, in addition to giving courses and lectures on the subject in Brazil and abroad. In this book, the author shares his experience as a researcher and teacher. Based on extensive bibliographical research, scientific result and practical tips for optimizing the eucalyptus pulp refining process are presented. We highlight the identification and description of the ‘missing variable’ in the theory of the Specific Edge Load Theory, and , the proposal of an alternative to disc refiner configuration allowing the reduction on refining energy costs.