| Edition | Publication Year | Key Changes | | :--- | :--- | :--- | | | 2009 | Original; uses a blue cover. Problems are simpler. Outdated for modern courses. | | 2nd Edition | 2013 | Added MCAT-style review problems. Still used by many community colleges. | | 3rd Edition | 2019 | Significant overhaul: 30% new problems, updated constants, enhanced relativity section. This is the current standard. | | 4th Edition | Expected 2025-26 | Not yet released. |
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