From publisher blurb:
Unleash the powers of the mind into your BX/LL campaign!
Finally, after 40 years of waiting, there’s a psionics system for the classic editions of the world’s original fantasy role-playing game. It’s simple, intuitive, andprovides a gameplay experience that feels at home alongside the original rules of the game. Within this jam-packed 56-page book, you’ll find:
a simple, easy-to-play psionics system, tailor-made for classic versions of the world’s first role-playing game
2 complete BX/LL character classes—the mystic and the monk—specifically designed to support the system
support for basic and expert player levels
an easy-to-use psionic combat system based on the classic attack and defense modes
complete descriptions for 114 psionic abilities... broken into 6 different chakra/discipline groups... adapated from the best existing resources
tables for generating wild psionic abilities in non-psionic player classes
full stats and descriptions for 38 psionic monsters
tables for generating phrenic creatures
instructions on converting psionic monsters from other classic editions
conversions and additions for 8 monsters from Old School Adventures™ Accessory CC1: Creature Compendium
background information on psionic items, and descriptions for 13 specific items
support for mixing spellcasting and psionics
And much more!