War of the World War One: Martian Terror (War of the World War One #2)

Summer, 1916. The first wave of the Martian invasion comes down on Verdun, spreading despair and panic. Einstein, with the help of C. Flammarion and Prof. Challenger, have to unravel the secrets of a wrecked Martian vessel recovered by the Germans. In so doing, the horrible nature of the Martian pilots is revealed... But a surprising piece of news, causes the departure of Prof. Challenger for Saint-Petersburg...