8Tyran » Post-Goliath, K plus for possible minor swearing and minor action violence. The adventures of Deryn and Alek in the Zoological Society, and Newkirk on the Leviathan, and how their paths intersect, thanks to a new unstoppable weapon in the hands of the Darwinists. Part 4 of the Leviathan series, if I may be so bold as to call it that. :