TIAMAT'S WRAITH is the latest volume of the Expanse. The Expanse struck science fiction like a breath of fresh air and is basically serving as Game of Throne's slightly less successful brother in bringing genre fiction to the mainstream. It's a high concept series about wealth, power, politics, and an alien molecule that defies the laws of physics. Honestly, you can tell how much I like the Expanse in the fact that I'd still be happy to read the series if they ditched all of the alien technology business completely.
THE EXPANSE is one of the best series currently out there. It's also a series which has had its ups and downs. Some of them I've given 3 stars and others I've given 5 stars. I've always come back to it, though. Here, PERSEPOLIS RISING is setting the stage for the end of the line as we time skip 30 years to when our heroes are now in their 60s. They don't act like they are sixty so maybe it's a case of "sixty is the new thirty" thanks to advanced medical technology of the future but they do creak a bit more.
BABYLON'S ASHES is the sixth book of the Expanse series and the conclusion of the "Free Navy" arc. I was a huge fan of the Free Navy introduced in NEMESIS GAMES and eager to see the story carried to its conclusion. Unfortunately, I don't think the story worked out nearly as well as it was supposed to. There's a lot of flaws and while much of it is set-up for later volumes in the series as well as the "Laconian" arc, this just didn't feel like a great conclusion to the storyline.