Pushing ice by Alastair Reynolds (2006)
This is my favorite book with a big-dumb-object (BDO) in it. There’s lots of hard-science-fiction, well developed characters wrapped up in a fascinating story. Yes, there’s BDOs, but the story is more about the characters and humanity’s fight for survival.
This is one of those books that after you’ve finished it, you cannot stop thinking about it.