This text is intended as a textbook for graduate students and research workers who wish to apply photoemission techniques in the fields of solid state physics and chemistry and particularly surface science. It is particularly suitable for the users and libraries of synchrotron light centres, universities and research laboratories. Emphasis is placed on the use of synchrotron light, as this is a field which has expanded rapidly since the early 1980s. The review of the subject is comprehensive and up-to-date.