The Second War of the Worlds

From the back cover of the DAW first edition: "The Martian's are coming... again! As everyone knows, there are parallel Earths. So when the Martians failed in their efforts to conquer the Victorian world as told in H. G. Wells' famous eye-witness account, they took one short step X-wise and, having immunized themselves against Terrestrial bacteria, tried again. Earth's parallel world is called Annwn, and it was just slightly behind Victorian England in technology. So when they detected the explosions on the fourth planet, it looked as if this time the Martians would succeed. But the Martians had failed to take into account one peculiarity of Annwn. Almost everything was the same as Earth, but there were certain curious scientific differences. Find out for yourself in this delightful, action-packed new novel of the Second Invasion from the Red Planet."