Erwin Bodenstedt — In Memoriam -- Theory Hyperfine Interactions -- Magnetism and Magnetic Materials — Bulk and Thin Layers -- HFI Probes in Semiconductors, Metals and Insulators -- PAC Probes as Diffusion Tracers in Solids -- Nuclear Spin-Lattice Relaxation of Single Crystal Sr14Cu24O41 -- Metal Atom Dynamics and Spin-Lattice Relaxation in Multilayer Sandwich Compounds -- Comparison of the Impurity Effects on Lattice Dynamics in K2SnCl6 between Isomorphic and Nonisomorphic Systems Near the Structural Phase Transition Temperature Revealed by Nuclear Resonance -- Nuclear Spin-Lattice Relaxation of 82BrFe -- Electronic Relaxation in Indium Oxide Films Studied with Perturbed Angular Correlations -- Surfaces, Interfaces, Thin Films, Nano-structures -- Resonance Methods -- Coherent Phenomena, Synchrotron Radiation, Quantum Optics -- Nuclear Moments, Nuclear Polarization, Nuclear Models -- Investigations in Biology, Chemistry, and Medicine -- New Directions and Developments in Methodology.Proceedings of the 13th International Conference on Hyperfine Interactions and 17th International Symposium on Nuclear Quadrupole Interactions, HFI/NQI 2004, held in Bonn, Germany, 22-27 August, 2004 Researchers and graduate students interested in the Mössbauer Effect and its applications will find this volume indispensable. The volume presents the most recent developments in the methodology of Mössbauer spectroscopy. Reprinted from Hyperfine Interactions (HYPE) Volume 158/159.