The Gods Look Down — Trevor Hoyle

When an ancient religious text reveals that nuclear physics capable of creating a new species of man existed in Biblical times, the mystified scientists of Earth IVn realise that something - or somebody - has been tampering with history . . .

It's up to Christian Queghan to use his extraordinary powers as a Myth Technologist to unravel this baffling enigma, for only he can cross the barriers of time and space to uncover the malevolent force linking the distant past to the mythical future. Queghan is working with another scientist, decoding the ancient texts from ancient history - until he realises that his own colleague is seeking to alter history using the results of the research.
Queghan must draw upon his ability to pass into alternate realities in an attempt to stop him, however dangerous it is for him.

Q: The Gods Look Down is Book Three of the Q Series, an epic science fiction adventure through parallel worlds.