The Complete Psionics Handbook (PHBR5), softback supplement for AD&D 2nd ed.
“Are you ready for the mind-blowing potential of the psyche? This handbook describes over 150 paranormal powers – telepathy, ESP, clairvoyance, psychokinesis, biofeedback, out-of-body travel – plus many amazing talents never before revealed. The psionicist is a completely new character class for AD&D games, both for player characters and NPCs. Explore inner space! Now you can really put mind over matter with The Complete Psionics Handbook.”
The GOOD condition copy is VERY GOOD externally, but features quite a lot of annotations in both ink and pencil.