Jack Campbell 
Lost Fleet [PDF ebook] 
Corsair #2

Captain John ‘Black Jack’ Geary is an Alliance legend, revered for his heroic ‘last stand’ in the early days of the war against the Syndicate. Long presumed dead, Geary miraculously returned from survival hibernation a century later, reluctantly taking command of the Alliance Fleet as it faced annihilation after a disastrous battle by Syndics.Thanks to a brave rearguard action by Black Jack’s relation, Captain Michael Geary, the fleet escaped destruction – but Michael was captured and has been held prisoner by the Syndics, despite the end of the war between the Alliance and Syndics which should have seen him freed.Now, Michael Geary has struck a deal with Executive Destina Aragon, leader of the Tigres, who has rebelled against the Syndic, to help them capture a "Mobile Forces Unit" – a Syndic battleship – and help her troops get home.