I'm new here, so my apologies to all if this book has been discussed before. It's 1967, and Chiron Cat's Eye in Draco, time traveler from the year 2467, has just arrived in the Haight Ashbury on the eve of the Summer Solstice--the beginning of the Summer of Love. Chi is a native San Franciscan from the 25th century on a mission to protect all of space and time. He must find the "axis"--a 14 year old runaway who will turn out to be the great-great grandmother of the first female president of the United States--and protect her from DEMONs--Devolved Entities Manifested from the Other Now. The Other Now is a nightmarish hell, and Chi must prevent it from becoming the future of humanity. He soon finds that the Haight is filled with Indian Chiefs, reincarnations of Merlin, gurus, Pharoahs, and assorted other wondrous beings. In an environment like that, a time travler from the 25th century doesn't make much of a splash... This book was first published in 1994 by Bantam books. I don't know if it is still in print or not, but it is well worth seeking out. It is, quite simply, one of the best books i have ever read.