There are many excellent books giving an introduction to solid state physics. This book on advanced topics is in many ways different from traditional books within this field. It has an excellent mixture between modern and traditional topics, with emphasis on strongly correlated phenomena. The topics range from interacting electron gases, local magnetic moments, the Kondo effect and plasmons, through topics like bosonization, electron-lattice interaction, superconductivity and disordered phenomena, to quantum phase transitions, the quantum Hall effect, topological insulators and `Mottness', a term introduced by the author for the non-rigidity of Mott bands.