Unofficial supplement for AD&D.
From the back cover:
Since the dawn of time, man has dreamed of having power over the universe around him...
This sourcebook makes this dream a reality.
Psionics includes: Over 100 new spells; new magic items; five highly detailed psionicist sub-classes, including: Somniomancers, Telepaths, Telekineticists, Pyromancers, and Empaths; and adventure ideas that any Game Master can easily augment and alter to fit his gaming needs.