W. Hodges, A Shorter Model Theory, Cambridge University Press, 1997.
Articles and Preprints
Applications of Model Theory to Algebraic Geometry . A collection of articles leading up to Hrushovski's proof of the Mordell-Lang conjecture for function fields. It contains introductory articles on model theory, omega-stability, omega-stable groups and the model theory of algebraically closed fields.
D. Marker, Model theory and real exponentiation. A survey on the model theory of the real numbers with exponentiation that appeared in the Notices of the AMS. (postscript file)
The following two papers are surveys aimed at people with some background in logic.
D. Marker, Strongly minimal sets and geometry.
An introduction to geometric model theory and Hrushovski's proof of the Mordell-Lang conjecture. (postscript file)