The long afternoon of Earth

Millions of years from now, the Earth stops spinning. One half of the world is in shadow, while the other suffers under an endless afternoon sun. Humans have devolved into small creatures struggling for survival in a savage jungle where plants prey upon living flesh, while huge spider analogs spin their webs between the Earth and the moon. In this deadly land a young boy on the brink of manhood is cast off by his tribe for the crime of curiosity--and embarks on a perilous journey far beyond the borders of his people's land in search of a better world.