Trialogues are a unique form of intellectual performance in which three people, optimally very different, discuss (or debate) a set topic for a fixed period of time. Sheldrake, McKenna, and Abraham have been in trialogue as friends since 1982, in public since since 1989, and in print together since 1992, in Trialogues at the Edge of the West, available in French, German, Portuguese, and Dutch, as well as English. The Evolutionary Mind, Trialogues at the Edge of the Unthinkable is their second set of trialogues to be published, and cover new topics: grassroots sciences, visual math, biogeography, homing pigeons, the world wide web, psychic pets, fractals, the structure of time, the celestial sphere, the millennium, and the holistic vision.