Scions of a Primordial Planet

From the Introduction This is not the Mars we know from NASA's press releases. It is old but still fertile, the skies are blue and it is criss-crossed with canals of all size, all flowing towards the Great Sea of Mars, a slumbering ocean of great breadth and depth. Mars is an old planet and there have been an untold number of civilizations over its many eons...and all of these civilizations have left behind their marks.