Executor Rising - the start of The Circuit series.
I remember when I first started reading The Expanse series and how I was surprised that I found it compelling even though human space travel was limited to our own solar system. No warp drives or hyperspace conduits seemed pretty boring at first, but I eventually came around because limiting the scope of the story to our own solar system made it that much more real. Although similarly limited to our solar system, Executor Rising puts aside realism and instead offers up something much farther out there in concept. The Earth is no longer a habitable planet and mankind instead has The Circuit, which is an interdependent ecosystem that uses Solar Arks to transport needed materials between human colonies that are spread across the solar system. This new ecosystem is just as fragile as the Earth was and it comes under assault for various reasons.
As one would expect mankind is the primary reason that the Earth is no longer our home, as we mined the planet until it became unstable after the discovery of a new element called Gravitum. Once it was discovered that passing an electrical charge through this element created artificial gravity, the era of expansion across the solar system was begun. Since every ship built needed Gravitum to operate, our insatiable appetite drove us to strip mine our home planet until it became geologically unstable. Earth is no longer our home, but it is still our main source of Gravitum, and the New Earth Tribunal has risen to power driven by the belief that someday we will return when the Spirit of the Earth welcomes us back. Not everyone shares this new religion and the various factions within The Circuit clash in a war orchestrated by a single individual.
I have to admit that I found the name Gravitum a bit corny and it took me a while to start to care about the characters that lived in this unfamiliar future, but eventually I did get invested in wanting to know the outcome. Somehow the whole became greater than the sum of its parts, which is good because nothing is wrapped up by the end of this book. Is this series on par with The Expanse? No, not even close. However, if you are willing to roll with with less "science" and more "fiction" in your Sci-Fi then this series does have some interesting moments. Coincidentally the audiobook version is narrated by Jefferson Mays, who also narrates the Expanse, and that is never a bad thing.