Pushing Ice

Pandoras star by Peter f Hamilton. This along with pushing ice and the culture series opened a new vast world for me. Will keep rereading them every few years

One of my favorites is based on a similar premise, Pushing Ice by Alastair Reynolds. I like most of his work but for short stand-alone stories this one stands out. Reynolds works are hard sci-fi, mostly sticking within the known laws of physics which present some interesting problems for the characters.