Prelude/WarmUp: http://www.math.ist.utl.pt/~mjmorais/WarmUp.pdf
Chapter 1: http://www.math.ist.utl.pt/~mjmorais/Chapter1.pdf
Chapter 2: http://www.math.ist.utl.pt/~mjmorais/Chapter2.pdf
Chapter 3: http://www.math.ist.utl.pt/~mjmorais/Chapter3.pdf
Chapter 4: http://www.math.ist.utl.pt/~mjmorais/Chapter4.pdf
Chapter 5 (incomplete): http://www.math.ist.utl.pt/~mjmorais/Chapter5incomplete.pdf