1. Iron-based superconductors : discovery and progress in materials / Hideo Hosono -- 2. Synthesis and physical properties of the new potassium iron selenide superconductor K[subscript 0.80]Fe[subscript1.76]Se[subscript 2] / R. Hu. [et al.] -- 3. Angle-resolved photoemission spectroscopy of iron pnictides / Takafumi Sato. [et al.] -- 4. Quantum oscillations in iron pnictide superconductors / Suchitra E. Sebastian -- 5. Optical investigation on iron-based superconductors / Nan-LinWang and Zhi-Guo Chen -- 6. Antiferromagnetic spin fluctuations in the Fe-based superconductors / Shiliang Li and Pengcheng Dai -- 7. Review of NMR studies on iron-based superconductors / Kenji Ishida and Yusuke Nakai -- 8. Material specific model Hamiltonians and analysis on the pairing mechanism / Kazuhiko Kuroki -- 9. The antiferromagnetic phase of iron-based superconductors : an itinerant approach / Johannes Knolle and Ilya Eremin -- 10. Magnetism in parent compounds of iron-based superconductors / Jiangping Hu.