Solid state physics is the study of rigid matter, or solids, through methods such as quantum mechanics, crystallography, electromagnetism, and metallurgy. It is the largest branch of condensed matter physics. Solid-state physics studies how the large-scale properties of solid materials result from their atomic-scale properties. Thus, solid-state physics forms a theoretical basis of materials science. It also has direct applications, for example in the technology of transistors and semiconductors, these topics are important to know: Crystal groups, Bragg reflection, Dielectric and diamagnetic constants, Bloch spectra, Fermi level, Conductors, semiconductors and insulators, Specific heat, Electrons and holes, The transistor, Superconductivity, and Hall effect.

I recommed  Solid-State Physics by Ashcroft and Mermin, and Introduction to Solid State Physics by Kittel. Also you can see Prof. David Tong lectures of Solid State Physics and Quantum Hall Effect.