The Puzzler's War

Battling through a brutal future and returning to the dangerous City of Towers, they will need brains, heavy weapons, and a whole lot of luck to survive.
But they are also haunted - and hunted - by shadows of the past. The story of a scientist who survived the end of the world holds deadly secrets. And a ruthless assassin from another era is on their trail.
Stunningly creative and breakneck-paced, book two of The Tarakan Chronicles is a science fiction adventure like no other.