Dynamics in one complex variable: introductory lectures by John Milnor (Stony Brook IMS Preprint 1990/5; revised September 1991)

Primary lecture text: abel.math.harvard.edu/archive/118r_spring_05/docs/milnor.pdf

Archive record: arxiv.org/abs/math/9201272

Cited passages: sections 2–3, normality, Fatou/Julia sets and the squaring map; section 7, parabolic petals and basin definition; Appendix F, quadratic parameter space.