From Owen's introduction:
"I have always been a big fan of psionics. Some of my first professional, paid projects were articles about psionics for previous editions of the rules (in a magazine with a name that rhymes with Flagon). My decade-long home campaign had numerous psionic groups and characters, and I continued to allow such characters in the more recent OGL games I ran. With the advent of the Pathfinder Roleplaying Game Core Rulebook, however, psionics suddenly seemed out of kilter with the new rules. Although they were close enough that I could use them, I saw a disconnect between the old psionics rules and the new game. The amount of work required to bring them fully in line with what I was now playing seemed insurmountable. I feared my beloved psionics might be gone for good.
Then, Dreamscarred Press released Psionics Unleashed Core Psionics System. The rulebook takes the old psionics rules, and brings them fully in line with the new game. Characters from psions to soulblades are as good as new, maybe better, and can stand side-by-side with rogues, wizards, paladins, witches, and inquisitors as viable options for player and GM alike. Psionics Unleashed is clearly one of the best examples of the OGL in use, taking rules and ideas that already existed and putting a new spin (and a lot of hard work) into them to create something new.
Of course, any new rules set can use even more options! As we do with many subjects, Super Genius Games plans to explore and expand the existing psionics rules, starting with this product. We want to do this both because they are excellent rules and because they have a broad community already adapting them. We plan for all our psionics-related products to build off the rules from Psionics Unleashed, and we thank Dreamscarred Press for allowing us to indicate that compatibility with the Psionics Unleashed Compatibility Logo."