Metaconcert (Intervention) Paperback – January 13, 1989 by Julian May
 
All over the world, the metapsychics are honing their skills, learning to stretch their incredible minds far beyond the ken of ordinary humans. Most are dedicated to the harmony of the human soul. But some have darker intentions...

If the metapsychics succeed in uniting Earth's minds to take the next step up in human evolution, a place awaits humanity among the alien peoples of the fabulous Galactic Milieu. But if evil minds prevail in their bid for power, Earth will be cut off...and mankind forever doomed!
 
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