Personally, Antifragile by Nassim Nicholas Taleb and Meditations by Marcus Aurelius.
The concept of Antifragility, where systems and individuals not only withstand chaos but actually benefit from it, had reshaped my perspective on risk, resilience, and adaptability. It is extremely complementary to the writings of Marcus Aurelius but differing in key ways.
While both Antifragility and Stoicism encourage resilience in the face of adversity, they approach it differently. Stoicism emphasizes inner calm and acceptance of what cannot be changed, while Antifragility encourages actively seeking out challenges and volatility to grow stronger.
For me, the blend of these philosophies provides a more holistic approach to navigating life's uncertainties, combining the wisdom of the ancient Stoics with a proactive stance toward embracing chaos and harnessing it for personal growth.