Earthfall (Unabridged‪)‬

Sam wakes to see strange vessels gathered in the skies around London. People stream past, walking silently towards the enormous ships which emit a persistent noise. Only Sam seems immune to the signal. Six months later, Sam is absolutely alone. In his underground bunker he only has food and water for a couple of days. He has no choice but to venture above. Spotted by a flying drone, Sam escapes, but the drone slashes him with a barbed tendril. Without medical supplies the wound will kill him, but this time above ground, he is less lucky. Cornered again, Sam thinks he has reached the end - then the drone is shot down in a hail of machine gun fire. In five minutes Sam learns two things. He is not alone, and the drone injury should have killed him instantly - yet he is still alive. The battle for earth is about to begin...