This series starts with the premise that earth has been decimated by an alien species called the Wraith. Then the tables are turned (or are they?) and all of earths forces are united in destroying their new enemy. That enemy is slippery though and nothing is quite what it seems. I am on to book two, but not sure I can wait for three to get published before I finish. Still it is what it is and I look forward to catching up with the characters as they progress on their adventures in time and space.