Professor Jón Karlsson is one of the main authors of the book Basic Method Handbook for Clinical Orthopedic Research. A Practical Guide and Case Based Research Approach, recently published by Springer International Publishing AG in collaboration with ISAKOS (International Society of Arthroscopy, Knee Surgery and Orhopedic Sports Medicine). The book is intended for both new and experienced researchers in orthopedics, and describes the basic, clinically relevant knowledge in research methodology. It covers, among other things, protocol design, the basics of statistics and data-based tools, and the implementation of various levels of clinical studies.