  These lecture notes give a brief introduction to heavy fermion physics,
emphasizing aspects of particular modern interest. Following an introduction to
the Kondo effect and the phenomenology of heavy fermions, the article
introduces Kondo insulators, the simplest heavy fermions; the large N expansion
for the Kondo lattice; heavy fermion superconductivity including the symplectic
N approach; topological Kondo insulators and finally a discussion of the
challenge of understanding the co-existence of magnetism and the Kondo effect.
