The second course of the International School on the Physics of Exotic Atoms took place at the "Ettore Majorana" Center for Scien- tific Culture, Erice, Sicily, during the period from March 25 to April 5, 1979. It was attended by 40 participants from 23 insti- tutes in 8 countries. The purpose of the course was to review the various aspects of the physics of exotic atoms, with particular emphasis on the re- sults obtained in the last two years, i.e.,...