The End of All Things: The Old Man’s War series

OUR FATE IS IN THEIR HANDS

The Colonial Union's Defence Force was formed to save humanity when aggressive alien species targeted our worlds. Now, Lieutenant Harry Wilson has an urgent new mission. He must investigate a sinister group that lurks in the darkness of space, playing factions of humans and aliens against one another.

The Defence Force is also weakening as its soldiers fall. Relations with Earth have broken down and it's stopped sending replacement troops as human colonies become increasingly vulnerable to alien attack. Lieutenant Wilson and Colonial Union diplomats must race to keep the peace, seek reconciliation with Earth, and maintain humanity's unity at all costs. If they don't, it will mean extinction and the end of all things.

'Delightful, compulsively readable, and even somewhat nutritious brain candy'
Kirkus Reviews

'Polished and powerful . . . Scalzi knows just how to satisfy his fans'
Publishers Weekly