All of these recommendations so far are a grab bag of anything sci-fi. For something with similar themes and more of a focus on space warfare ops I would highly recommend Expeditionary Force by Craig Alanson.

Briefest possible synopsis: humans are forcefully introduced to wider space civilization, which is in a constant state of structured war. The focus is on a covert ops team always trying to get an edge by outsmarting much more powerful civilizations. It's dramatic and funny.