The War of Pawns
(The Human Chronicles #3)
by T.R. Harris (2012)

In The War of Pawns, Adam Cain, a Human lost in a galaxy of alien empires and exotic locales, fights desperately to return to Earth, only to find that his homecoming is anything but joyous.

Now that contact has been established with earth, it looks like war. As usual our heroes are right about the aliens and the Earth politicians are duped to fight. More action in this episode than previous ones.