Random Walkers, Book 1, The Edge of Revelation

Unguessable millions of years away in time, the wandering explorations of two immortal Minds across the limitless expanse of the Universe brings them into contact with a life form called Humanity. Their curiosity gets the better of them as they unintentionally become highly involved with the activities of this super tech, almost god like, species. As a result of this intimate contact, they learn the unbelievable secret of Humanities creation and its ongoing struggle with a stunningly intelligent and ancient race of beings over half a billion years old.