Thomas Szaz wrote about deciphering and entering the world of the schizophrenic to establish the bridge back to health. Foster creates the bridge to the beyond human in a way that takes the reader into the other almost without our being aware. There's a seqence in Zan that is almost a dream state which captured me - took me in. Zan - the tale of the near human leaving earth to find freedom. The Warriors of Dawn carries on centuries later with a love story between human and near human. And Klesh, centuries later still, with the convergence of minds bringing the history together in an unimagined fashion.