Jack Campbell's Lost Fleet series is essential military sci-fi and a brilliant twist on Arthurian legend... in space.
The universe of the original six-book saga, about a legendary military commander who awakens from cryosleep to save humanity from disaster, has been expanded in two subsequent spin-off series, The Lost Fleet: Beyond the Frontier and The Lost Stars.
Now it's growing again with Vanguard, the first book of the new Genesis Fleet series and Ascendant, the second volume, just published in 2018.