The article discusses the author's six-year journey of self-studying mathematics, sharing their recommended books and resources for learning mathematics. The author emphasizes the importance of picking the right books with exercises and solutions, and also mentions the value of online courses and podcasts. The article provides a list of recommended books and resources for different topics in mathematics, including calculus, linear algebra, and proofs. The author also shares their personal experience and tips for staying motivated and overcoming challenges in self-studying mathematics.