| Feature | Standard 4th Ed. | Enhanced Edition PDF | | :--- | :--- | :--- | | | High-quality, static | High-quality + interactive links | | Clinical Content | Separate boxes | Integrated video case studies | | Memory & Learning | Chapter 24 only | Spaced repetition quizzes throughout | | Price | Used (~$50) | Digital rental (~$60/semester) | | Searchability | Index only | Full-text Ctrl+F search |