A decade or two ago, I read a sci-fi series (at least two books) about super strong stretchy material connecting the planets, with an ominous conqueror taking over. And then there were the intelligent comets which could move themselves around by converting a bit of mass into energy.
Additional details I remember: humans have digital/nanobot immune systems; when there are military attacks these get taken out.
There’s also a sentient being that sometimes occupies a car and can teleport.
I think I read until the asteroids and outer planet humans teamed up to combat the conqueror in the physically webbed together inner system.
I can’t for the life of me remember the name of the novels.