The Lost Guardian

Description for THE LOST GUARDIAN by Ronald Anthony Cross:

In the shadow of the Coloseum, the Stone of Power was divided among four Romans who proclaimed themselves Guardians of humanity. Even now, the Stone's power attracts those who would meddle with history, as a power-mad psycho has hired two powerful psychics to mess with the 20th century. Perhaps Ketoko, lord of all times, can keep them from destroying all life on Earth.