Spencer Johnson is an American author and physician widely known for his contributions to modern motivational and business writing. Born in South Dakota, he trained as a physician before turning to writing, rising to international acclaim with his bestselling book Who Moved My Cheese?, followed by works including The One Minute Manager, co-authored with Kenneth Blanchard, and The Precious Present. Drawing on simple parables and accessible storytelling, his books distill lessons about change, motivation, and effective management into short, widely digestible narratives aimed at both individual readers and organizations. Who Moved My Cheese? became a global publishing phenomenon, selling millions of copies and becoming a staple of corporate training programs addressing change management. Known for his simple, parable-driven approach to complex ideas about change and leadership, Johnson's work continues to shape modern business and self-help writing and inspire readers across the world.