In the Black

It's The Hunt for Red October in space with this brand new military science fiction novel from Patrick S. Tomlinson, In the Black

In a demilitarized zone on the border of human space, long-range spy satellites are mysteriously going quiet, and no one knows why. Captain Susan Kamala and her crew are dispatched to figure out
what's going on and solve the problem.

That problem, however, is a mysterious bleeding edge alien ship that no human vessel could hope to match in open conflict. But, it's not spoiling for a fight.

Now the captain and her crew must figure out how to navigate a complicated game of diplomacy, balancing the needs of their corporate overlords and the honest desire for a lasting peace
between the two races, all without letting a long-standing cold war turn hot.