Dr. Igor Gaponov received his MS and PhD degrees from Koreatech in 2008 and 2011, respectively. He is currently Assistant Professor at Korea University of Technology and Education (Koreatech), Chungcheongnam-do, Republic of Korea. Dr. Gaponov has been actively involved in research on twisted string actuators for the past 7 years, publishing several key papers in this area in the international referred journals and conferences, and filing international patents. Thanks to collaboration with other research teams and universities around the world working in the TSA area, he is well informed about the state of the art and recent advances in the TSA technology and aims to bring the existing knowledge base together in one book. Jee-Hwan Ryu received his BS degree in Mechanical Engineering from Inha University, Rep. of South Korea in 1995, and his MS and PhD degrees in Mechanical Engineering from Korea Advanced Institute of Science and Technology (KAIST), Taejon, Korea, in 1995 and 2002, respectively. He is currently a Professor at the Department of Mechanical Engineering, Korea University of Technology and Education. His research interests include haptics, telerobotics and teleoperation, exoskeletons, and flexible manipulators. Korea University of Technology and Education, Republic of Korea