Reading list
There are a large number of books on complex variable. The best book
to learn the material is the one you find the best. Here is a
somewhat random and unsorted list:
Complex Analysis: T. Gamelin
Complex Analysis: G. Cain
Complex Analysis: L. Ahflors
Complex Analysis: K. Houston
Functions of One Complex Variable: J. Conway
Introduction to Complex Analysis Lecture notes: W. Chen
The theory of functions: E. Titchmarsh