The proceedings of the fifth in a series of international solar polarization workshops are contained in this volume for researchers and scientists, with experts in the field discussing new advances in high resolution spectro-polarimetry. Editors Berdyugina (astronomy, ETH Zurich), Nagendra (astrophysics, Indian Institute of Astrophysics) and Ramelli (astrophysics, Istituto Ricerche Solari Locano) compile papers that discuss such topics as the quantum theory of polarized light scattering in the presence of magnetic and electrical fields, quantum aspects of the Second Solar Spectrum and the use of Zeeman and Hanle effects to diagnose the fine structure of solar magnetic fields. Several new telescope projects concerning polarimetric instrumentation are also discussed. Annotation ©2009 Book News, Inc., Portland, OR (booknews.com)