Jen Sincero's self-help book, "You Are a Badass." The excerpt focuses on overcoming self-doubt and limiting beliefs to achieve one's full potential. Sincero shares personal anecdotes and offers practical advice, encouraging readers to embrace their awesomeness, connect with their inner guidance, and live a more fulfilling life. Throughout the excerpt, she emphasises the importance of self-love, positive thinking, and taking action to create positive change.