List of contributors; List of participants; Preface; Acknowledgments; 1. Astrophysical magnetic fields: essentials J. Sánchez Almeida and M. J. Martínez González; 2. Solar magnetic fields. History, tragedy or comedy? P. G. Judge; 3. Stellar magnetic fields O. Kochukhov; 4. The role of magnetic fields in AGN activity and feedback R. Keppens, O. Porth and H. J. P. Goedbloed; 5. Magnetic fields in galaxies R. Beck; 6. Primordial magnetic fields in the Early Universe and CMB anisotropies F. Finelli and D. Paoletti.