I am trying to figure out the title and author of a military SF i read 1-2 years ago (2013/2014). The human race and its worlds are in a fight with a technology superior race of aliens that are in fact descended from rats and see it as their religious obligation to wipe out humanity.
The main character is a relatively junior space navy officer that is very effective and successful but has some issues with following military hierarchy. Another key character is a brain in a box - what is left of a handicapped individual that turns into being a military genius that can coordinate simultaneously a spacefleet in full combat. Then there is a the mysterious race of technology superiors "hunter beings" that you can only handle by not showing any fear an gain their respect.
The end of the 1st book is the moment that earth rejects to capitulate to the demands of the rat aliens despite overwhelming odds and chooses to fight.