I’ve had several people recommend the Lost Fleet series to me. I’m a space opera fan, and space battles/military SF is an “easy read” for me. The books have proven to read pretty quickly.
Campbell has a great hook in this series with his hero, who has to reinstill tactics and an honorable code of conduct within ‘the good guys’. I’ve actually read the second in this series as well. The first arc goes six books and there are additional series for another fourteen books so I can keep going as long as I can find them!