For those seeking an introductory book on complex analysis for self-study, "Complex Variables and Applications" by Brown and Churchill is highly recommended, noted for its accessibility and abundance of problems with solutions, making it suitable for independent learners. While it is considered a standard textbook for undergraduate courses, its price may be a concern, prompting suggestions to seek it from libraries or opt for international editions. Other notable texts include Fisher's book, which is affordable, and Ahlfors' work, praised for its clarity and depth, particularly for those with a background in real analysis. Lang's book is used in some courses but has mixed reviews, with Conway often recommended as a preferable alternative. For engineering applications, Kreisig's text is suggested, while Copson's "Introduction to the Theory of Functions of a Complex Variable" offers a classical mathematical approach. Additionally, Stein and Shakarchi's book is recognized for its comprehensiveness, and resources like Stewart and Tall's "Complex Analysis" are also mentioned.