On a parallel Earth perpetually laid waste by the Harriers of the Horde, a young man must ferry what may be a true account of Jesus's teachings to distant London. He's helped by a lonely ghost, a goblin, a demon, and a warrior woman riding a...
"The time trails led him to mastodons, money and the most amazing mystery of all: time."
Mastodonia (1978) (published as Catface in the UK, a considerably expanded and re-written version of Simak's 1955 short story "Project Mastodon" which...