Agent-based simulation has become increasingly popular as a modeling approach in the social sciences because it enables researchers to build models where individual entities and their interactions are directly represented. The Second Edition of Nigel Gilbert′s Agent-Based Models introduces this technique; considers a range of methodological and theoretical issues; shows how to design an agent-based model, with a simple example; offers some practical advice about developing, verifying and validating agent-based models; and finally discusses how to plan an agent-based modelling project, publish the results and apply agent-based modeling to formulate and evaluate social and economic policies.
Highly recommended to anyone wanting to start building/publishing their own agent-based models. A good introductory book to any graduate class on the subject.
Another really good introduction -- I'm really liking these little Green books -- although I only got my hands on the first edition, so the applied stuff is a million miles off relevance now. Still, the primer helped.