I really enjoy Hines' books.

His voice adds a real levity to the books and makes them fun to read while he addresses real and serious problems.

Terminal Alliance starts with what the internet might know as the "Humans Are Space Orcs" premise. Our pursuit predator evolution makes us extremely hardy and tough to kill compared to other species. Speaking of other species, humanity once wiped itself out with a plague, turning itself into a shambling bunch of "ferals". Aliens come in and restore humanity's sentience but conscript us to a special military that is feared through the galaxy.

Enter Maps and her crew of janitors onboard one of the human crewed ships. They become the only non-reverted, non-dead crew after an attack on their ship. Their fight to survive leads to some tough answers about what happened to humanity all those years ago.

Like I said, it handles some issues about what basic human nature is like in a truly fun way. It's a great read.