Shadow Warriors: Storm Clouds by Nathan B. Dodge

The Shadow Warriors face two grave threats that could destroy the galaxy!

Cal, Letty, Tony, Opi, and Sasha—the Shadow Warriors—were kidnapped by the Molethian civilization and trained as a fighter crew to battle against The Horde, the most dangerous enemy in the galaxy. As they continue to battle against The Horde, they rise in the ranks—and now each Shadow Warrior has special responsibilities.

In the last, titanic engagement with The Horde, Alliance forces were attacked by a second enemy, which is now besieging members of the Alliance. This new threat has substantially destroyed two planetary civilizations. Now, in addition to facing more attacks from The Horde, the Shadow Warriors and the Alliance must try to control this new enemy…and that may mean provoking a war between these two threats.

That may mean sending an expedition to The Horde’s home galaxy, and also a return to Earth, to enlist the aid of the human race. And the stress could well break apart the Shadow Warriors!