The source material offers a comprehensive guide to diagnosing and correcting a persistent golf hook, which is defined as a shot curving sharply to the left for right-handed players. It explains that a hook is primarily caused by specific swing flaws, including a closed clubface at impact, an overly inside-out swing path, and excessive hand or wrist action that promotes sidespin. The episode provides five actionable fixes to eliminate the hook, starting with checking the grip and ensuring the clubface is square at address before moving on to adjusting the swing path and controlling hand action. Furthermore, the source highlights that improper body alignment, equipment issues such as a closed face design, and overcompensation for other faults can also contribute to the severe right-to-left ball flight.