Some selected sources
First book in field, not recommended as introduction: Adaptation in Natural and Artificial Systems, John Holland, 1975. Reprinted by MIT Press
Theory-oriented textbook: Genetic Algorithms in Search, Optimization, and Machine Learning, David E. Goldberg, Addison-Wesley, 1989
Application-oriented textbook: Handbook of Genetic Algorithms, Lawrence Davis, Van Nostrand Reinhold, 1991