"The Teacher Who Couldn't Read" is a book by John Corcoran that tells the story of a man who became a successful teacher despite struggling with illiteracy. He managed to hide his inability to read from his students and colleagues for many years, using various strategies to navigate his professional life. The book explores the challenges and stigma associated with illiteracy, as well as the impact it can have on a person's life. Corcoran shares his journey of overcoming these obstacles and ultimately learning to read, highlighting the importance of education and self-advocacy.