From the cover -
If you’re looking for a better rules set for your psionics/psychic-based d20 System campaign, you may discover what you need within Mind Over Matter. Within this book you’ll find the following:
* Rules compatible with the standard d20 System and d20 Modern.
* A new skill-based psionics system with fully described skills and complementary feats.
* Two new player character races.
* New classes, new prestige classes, new equipment, and more!
48 Pages of everything you need to fill your campaign with the well balanced psionics system!
If you want to try something different in your campaign, you may just find what you seek within Mind Over Matter.