Most of the following books, articles or notes are available as e-books from the MSU Library or online at the links below.
The main
Holomorphic Curves in Low Dimensions, by Chris Wendl.
The following additional textbooks cover much the same material with differing emphasis and varying levels of sophistication.
Contact 3-Manifolds, Holomorphic Curves and Intersection Theory, by Chris Wendl.
Introduction to symplectic topology, by McDuff and Salamon.
Introduction to symplectic topology ("short book") by McDuff and Salamon.
J-holomorphic curves and symplectic topology (``big book'')