SOLVED. Science fiction. MU in pacific discover underground race resembling modern conception of devil. Continuous war MU starship flees as continent is destroyed. Cloven hoofed race flees in starship as well. [s]

[Robert]

MU in pacific discover underground race resembling modern conception of devil. Continuous war MU starship flees as continent is destroyed. Cloven hoofed race flees in starship as well. Change to not too distant future; 21st century an illegal or semi-legal test of a starship goes awry( impact on gravity well of asteroid) and earth ship is flung into the middle of the war between the two ancient earth races and somehow end war or help Mu win.

[Andy]

Sounds like "The Mightiest Machine" by John W. Campbell (see description here https://en.wikipedia.org/wiki/The_Mig...) - goodreads link The Mightiest Machine

This link mentions Mu and cloven hooves for the villains http://www.troynovant.com/Grube/Campb...

[Lobstergirl, au gratin]

Robert, please add some plot details to your header. This helps not only the people searching for your book when it's unsolved, but anyone in the future once the thread is solved who is searching for your book.

[Lobstergirl, au gratin]

Also what is MU?

[Andy]

Mu is a legendary continent, the Pacific equivalent of Atlantis.

[Lobstergirl, au gratin]

Oh okay. I thought it might be shorthand for mutants.

[Andy]

Looks like the Mightest Machine was right - Robert must have moved this to Solved when I wasn't looking

[Lobstergirl, au gratin]

Robert, can you confirm that?

[Robert]

Sorry yes, this is solved that was the work i was looking for.Thanks all! Robert

[Andy]

Great!.

[Lobstergirl, au gratin]

Added plot details to the header. This helps not only the people searching for your book when it's unsolved, but anyone in the future once the thread is solved who is searching for your book.